GB/T 7344-2015General specification for AC servomotors (English PDF)

3.1 Maximum stall torque

The minimum value of the stall torque generated when the motor is in different positions under the rated power supply state.

3.2 Rated power state ratedpowercondition

The excitation winding and the control winding of the motor are respectively fed with a rated excitation voltage of a rated frequency and a phase difference of 90 ° ± 3 ° (or rated capacitance) and

The power supply state at the rated control voltage.

4.1 Classification

According to the rotor structure type, the motor can be divided into three categories. squirrel cage rotor motor, hollow cup rotor motor and wire wound rotor motor.

4.2 Model Nomenclature

The model name of the motor shall comply with the provisions of GB/T 10405 (refer to Appendix A) or the product-specific technical conditions.

4.3 Basic outline structure and installation type

The basic shape structure and installation type of the motor shall comply with the provisions of GB/T 7346 or product-specific technical conditions.

4.4 Cooling method

The motor is cooled by closed natural cooling or closed forced cooling.

4.5 Circuit diagram

The circuit diagram of the motor is shown in Figure 1.

figure 1

4.6 Environmental conditions

The environmental conditions for the use of the motor shall be in accordance with Table 1 or the product-specific technical conditions.

Table 1

Environmental conditions grade temperature

Relative humidity

Air pressure kPa vibration

Shock peak acceleration m/s2

Constant acceleration m/s2

1a

-10~40

-25~40

-40~55

-55~85

90~95

74.8

74.8

10Hz~55Hz

Double amplitude 1.5mm

10Hz~500Hz low frequency

Double amplitude 1.5mm or peak acceleration

100m/s2

4.7 Power frequency and voltage level

The power frequency and voltage level of the motor are selected according to Table 2 or specified by the product specific technical conditions.

Table 2

Rated frequency

Hz

Rated excitation voltage

Control voltage

50 12,36,220 12,36,220

400 26,36,115 26,36,115

5.1 Appearance

5.1.1 Technical requirements

The surface of the motor should be free of rust, bumps, scratches and peeling of the coating. The color and marking should be clear and the fasteners should be securely connected.

The wire or terminal should be intact.

5.1.2 Test method

Visually inspect the appearance of the motor.

5.2 Nameplate

5.2.1 Technical requirements

The motor shall have a nameplate, and the nameplate shall comply with the relevant provisions of GB/T 7346 and the durability of GB 18211.

5.2.2 Test method

Test according to the method specified in 5.2.2 of GB/T 7345-2008.

5.3 Outlet method and marking

5.3.1 Technical requirements

The motor outlet mode can be adopted by lead wires, wiring boards or electrical connectors, which are stipulated by the special technical conditions of the products. Outlet marking should comply with Table 3

Provisions.

table 3

Terminal number lead wire color winding

1 yellow excitation winding (first)

2 red control winding (first)

3 white excitation winding (tail)

4 black control winding (tail)

5 red-black control winding (midpoint)

5.3.2 Test method

Visually check the outlet mode and marking of the motor.

5.4 Terminal or lead line strength

5.4.1 Technical requirements

The strength of the motor terminal or lead wire shall comply with the provisions of 5.3 of GB/T 7345-2008.

5.4.2 Test method

Test according to the method specified in 5.3.2 of GB/T 7345-2008.

5.5 Outline and installation dimensions

5.5.1 Technical requirements

The shape and installation dimensions of the motor shall comply with the specifications of the product-specific technical conditions.

5.5.2 Test method

According to the shape and installation size of the motor, the type and accuracy level of the gage are selected, and the motor is placed under normal temperature conditions to stabilize it.

After the non-operating temperature, the measurement is performed item by item.

5.6 radial clearance

5.6.1 Technical requirements

When required, the radial clearance of the motor shall comply with the specifications of the product-specific technical conditions.

5.6.2 Test method

Test according to the method specified in 5.5.2 of GB/T 7345-2008.

5.7 axial clearance

5.7.1 Technical requirements

The axial clearance of the motor shall comply with the specifications of the product-specific technical conditions.

5.7.2 Test method

Test according to the method specified in 5.6.2 of GB/T 7345-2008.

5.8 shaft extension radial runout

5.8.1 Technical requirements

The radial runout of the shaft extension of the motor shall comply with the specifications of the product-specific technical conditions.

5.8.2 Test method

Test according to the method specified in 5.7.2 of GB/T 7345-2008.

5.9 Coaxiality of the mounting mating surface

5.9.1 Technical requirements

The coaxiality of the mounting mating surface of the motor shall comply with the specifications of the product-specific technical conditions.

5.9.2 Test method

Test according to the method specified in 5.8.2 of GB/T 7345-2008.

5.10 Mounting the verticality of the mating end face

5.10.1 Technical requirements

The installation of the motor and the verticality of the end face shall comply with the specifications of the product-specific technical conditions.

5.10.2 Test method

Test according to the method specified in 5.9.2 of GB/T 7345-2008.

5.11 Insulation Dielectric Strength

5.11.1 Technical requirements

The windings of the motor shall be able to withstand the test voltage specified in Table 4 between the casing and its windings without insulation breakdown or internal arcing.

The peak leakage current of the middle winding is 5 mA, which is specified by the product-specific technical conditions. The motor should not be repeated during acceptance, but if the user mentions

The test is allowed to be carried out once again, and the test voltage should be 80% of the original test voltage.

Table 4 is in volts

Rated excitation voltage

Test voltage

Winding between the windings of the casing

24 frame number and below 24 frame number and above 24 frame number and below 24 frame number and above

<=20 100 0-3 250 0-8 100 0-3 100 0-3

>20~60 300 0-9 500 0-15 150 0-5 250 0-8

>60~115 500 0-15 750 0-23 300 0-9 400 0-12

>115~220 900 0-30 900 0-30 500 0-15 500 0-15

5.11.2 Test method

Test according to the method specified in 5.17.2 of GB/T 7345-2008.

5.12 Insulation resistance

5.12.1 Technical requirements

Under the standard atmospheric conditions of the test or under the low temperature test conditions specified by the product-specific technical conditions, the windings of the motor and the winding of the casing

The insulation resistance between the groups should be no less than 50Mohm, and the insulation resistance should be no less than 10Mohm under the corresponding high temperature conditions, under the corresponding damp heat conditions.

The insulation resistance should be no less than 1Mohm.

5.12.2 Test method

Test according to the method specified in 5.18.2 of GB/T 7345-2008.

5.13 Direction of rotation

5.13.1 Technical requirements

According to the wiring of Figure 1, the voltage phase of the output terminal 2 of the motor control winding leads the shaft end of the excitation winding, and the shaft extension from the motor mounting surface

In the end view, the rotating shaft should rotate counterclockwise, and the direction of rotation is defined as the positive direction.

Note. When the motor rotates in the forward direction, the outlet end 3 and the outlet end 4 are connected to the casing (ground).

5.13.2 Test method

According to Figure 1, the motor is unloaded, and the rated frequency and rated voltage of each winding are applied to rotate the motor shaft. Observe the rotation of the motor at this time.

direction.

5.14 Self-braking time

5.14.1 Technical requirements

The self-braking time of the motor should not exceed l5s or meet the requirements of the product-specific technical conditions.

5.14.2 Test method

When the motor reaches a stable non-operating temperature, the motor is in the rated power supply state, running at no load, and then measuring the rotor from the control winding

The maximum value is measured in the positive and negative directions of rotation from the moment of disconnection to the stop of rotation and the moment when the field winding is opened to the moment when the rotor stops rotating.

5.15 No-load starting voltage

5.15.1 Technical requirements

The no-load starting voltage of the motor shall comply with the specifications of the product-specific technical conditions.

5.15.2 Test method

Test according to the method specified in 5.11.2 of GB/T 7345-2008.

5.16 No-load speed and no-load current

5.16.1 Technical requirements

The no-load speed of the motor and the no-load current of each winding shall comply with the specifications of the product-specific technical conditions.

5.16.2 Test method

When the motor reaches the normal working temperature, it runs at no load under the rated power supply state, and measures the rotational speed of the motor in both the forward and reverse directions.

Each winding current.

5.17 Impedance

5.17.1 Technical requirements

When required, the winding resistance of the motor shall comply with the specifications of the product-specific technical conditions.

5.17.2 Test method

When the motor reaches the normal working temperature, the rated frequency and rated voltage are respectively applied to the windings one by one, and in the case that the remaining windings are open,

The impedance of each winding is measured at a time.

5.18 current

5.18.1 Technical requirements

The current of each winding of the motor shall comply with the specifications of the product-specific technical conditions.

5.18.2 Test method

When the motor reaches the normal working temperature, it is blocked in the rated power supply state, and the excitation windings in the positive and negative directions are measured separately.

And control the winding current.

5.19 Input Power

5.19.1 Technical requirements

The input power of each winding of the motor shall comply with the specifications of the product-specific technical conditions.

5.19.2 Test method

When the motor reaches the normal working temperature, it is blocked in the rated power supply state, and the excitation windings in the positive and negative directions are measured separately.

And control winding input power.

5.20 Maximum stall torque

5.20.1 Technical requirements

The maximum stall torque of the motor shall comply with the specifications of the product-specific technical conditions.

5.20.2 Test method

When the motor reaches the normal working temperature, it is blocked in the rated power supply state, and the rotor is in different positions (at least 3 places).

The stall torque is taken as the minimum value, and the test should be carried out in both the positive and negative directions of rotation.

5.21 Voltage Sensitivity

5.21.1 Technical requirements

When the excitation winding voltage of the motor changes to ±10% of the rated voltage, the self-braking time of the motor shall comply with the provisions of 5.14.1.

5.21.2 Test method

When the motor reaches the normal working temperature, under the rated power supply state, no-load operation, respectively raise and lower the excitation voltage to the rated excitation

110% and 90% of the voltage, after the speed is stabilized, the time from when the control winding is disconnected to when the shaft stops rotating is measured. The test should be positive,

Reverse the two directions of rotation.

5.22 Frequency sensitivity

5.22.1 Technical requirements

When the power frequency of the motor changes to ±5% of the rated value, the self-braking time of the motor shall comply with the provisions of 5.14.1.

5.22.2 Test method

When the motor reaches the normal working temperature, under the rated power supply state, the no-load operation, respectively adjust the frequency of the test voltage to the rated value

105% and 95%, after the speed is stabilized, the time from the moment the control winding is disconnected to the time when the shaft stops rotating is measured. The test should be in both positive and negative

The direction of rotation proceeds.

5.23 Speed at maximum stall torque 1/2

5.23.1 Technical requirements

When the motor generates 1/2 maximum stall torque, the speed should be no more than 75% of the no-load speed, or specified by the product-specific technical conditions.

5.23.2 Test method

When the motor reaches the normal operating temperature, under the rated power supply state, the motor applies half of the measured value of 5.20.1 to measure the speed.

5.24 Non-linearity of stalling characteristics

5.24.1 Technical requirements

The non-linearity of the stalling characteristics of the motor should not exceed ±10%, or specified by the product-specific technical conditions.

5.24.2 Test method

When the motor reaches the normal working temperature, it is blocked in the rated power supply state, the stall torque is measured, and then the control voltage is measured in turn.

20%, 40%, 60%, 80%, 100%, 110% of the locked rotor torque at rated control voltage. When measuring the stall torque at each point, you should first charge

Pressurize to the rated control voltage and maintain it to the stable operating temperature before adjusting to the required control voltage value for measurement.

The nonlinearity of the stalling characteristic is calculated according to formula (1).

Kd=

Ta

T0-

÷×100% (1)

In the formula.

Kd---the non-linearity of the stalling characteristic;

Ta --- The stall torque at each control voltage value, in units of cattle meters (N·m);

T0 --- stall torque at rated control voltage, in units of cattle meters (N·m);

A --- The relative value of the control voltage at each point in decimal, ie 0.2, 0.4, 0.6.

5.25 Rotor moment of inertia

5.25.1 Technical requirements

When required, the rotor inertia of the motor shall comply with the specifications of the product-specific technical conditions.

5.25.2 Test method

Test according to the method specified in 5.19.2 of GB/T 7345-2008.

5.26 Electromechanical time constant

5.26.1 Technical requirements

When required, the mechanical and electrical time constant of the motor shall comply with the specifications of the product-specific technical conditions.

5.26.2 Test method

The motor is unloaded. When the normal operating temperature is reached, the field winding maintains the rated voltage, and the control winding applies the step rated control voltage.

The oscilloscope records the complete waveform of the motor speed rise, and it is concluded that the motor no-load speed rises from zero to 63.2% of the stable no-load speed.

time.

5.27 Noise

5.27.1 Technical requirements

When required, when the motor is running under no-load conditions under rated power supply, the A-weighted sound power level of the noise shall conform to the product-specific technology.

Conditional provisions.

5.27.2 Test method

Test according to the method specified in GB/T 10069.1.

5.28 Temperature rise

5.28.1 Technical requirements

The temperature rise of the winding of the motor shall comply with the specifications of the product-specific technical conditions.

5.28.2 Test method

Test according to the method specified in 5.21.2 of GB/T 7345-2008, the motor is installed on the standard test bracket, except for product-specific technology.

Unless otherwise specified in the operating conditions, the motor excitation winding single-phase feed with the rated excitation voltage, the rotor is blocked, and its temperature rise value is measured.

5.29 low temperature

5.29.1 Technical requirements

The motor shall be capable of operating and storing under the low temperature conditions specified in the product specific technical conditions. Detecting the insulation resistance of the motor at low temperature, self-made

The moving time shall comply with the provisions of 5.12.1 and 5.14.1. Check that the no-load starting voltage is not more than 2 times as specified in 5.15.1.

The no-load speed shall comply with the provisions of 5.16.1, and the motor components shall not be broken or cause harmful deformation.

5.29.2 Test method

The motor is mounted on a standard test stand and tested according to the test method Ad in GB/T 2423.1.

5.30 high temperature

5.30.1 Technical requirements

The motor shall be capable of operating and storing under the high temperature conditions specified in the product specific technical conditions. Detecting the insulation resistance of the motor at high temperature, self-made

The dynamic time, no-load starting voltage and no-load speed shall comply with the provisions of 5.12.1, 5.14.1, 5.15.1 and 5.16.1, respectively.

The stall torque shall comply with the provisions of 5.20.1, the bearing grease shall not overflow, and the parts shall not cause harmful deformation.

5.30.2 Test method

The motor is mounted on a standard test stand and tested according to test method Bd in GB/T 2423.2.

5.31 Temperature change

5.31.1 Technical requirements

When required, the motor shall be able to withstand the extreme high and low temperature temperature changes specified in the product specific technical conditions. After the test, the bearing oil

The grease shall not overflow and the parts shall not cause harmful deformation.

5.31.2 Test method

According to the test method of GB/T 2423.22, the motor is tested, and the temperature limit value and the temperature change speed between the limit temperature are tested.

The rate, the number of cycles of temperature change, the holding time at each limit temperature and the operating conditions of the motor shall be in accordance with the specifications of the product-specific technical conditions.

5.32 low pressure

5.32.1 Low temperature and low pressure

5.32.1.1 Technical requirements

When required, the motor shall be capable of being stored and operated under the conditions of low temperature and low pressure specified by the product-specific technical conditions.

Provisions for special technical conditions.

5.32.1.2 Test method

Test according to the provisions of 5.25.1.2 and product-specific technical conditions in GB/T 7345-2008.

5.32.2 High temperature and low pressure

5.32.2.1 Technical requirements

When required, the motor shall be capable of being stored and operated under the conditions of high temperature and low pressure specified by the product-specific technical conditions.

Product specific technical conditions.

5.32.2.2 Test method

Test according to the provisions of 5.25.2.2 and product-specific technical conditions in GB/T 7345-2008.

5.33 Vibration

5.33.1 Technical requirements

Unless otherwise specified, the motor shall be capable of sinusoidal sweep or random vibration as specified in Table 7 of GB/T 7345-2008.

Work and transportation. After the test, the motor should not be loose or damaged, and the insulation resistance should be in accordance with the provisions of 5.12.1.

5.33.2 Test method

Test according to the method specified in 5.26.2 of GB/T 7345-2008.

5.34 Impact

5.34.1 Technical requirements

When required, the motor shall be capable of operating and transporting under the impact conditions specified in Table 8 of GB/T 7345-2008. After the test,

The motor should not be loose or damaged, and the insulation resistance should be in accordance with 5.12.1.

5.34.2 Test method

Test according to the method specified in 5.27.2 of GB/T 7345-2008.

5.35 Steady-state acceleration

5.35.1 Technical requirements

When required, the motor shall be capable of operating under steady-state acceleration conditions specified by the product-specific technical condit...