阅读说明：本技术 一种电机emc测试加载系统 (Motor EMC test loading system ) 是由 王绎维 邵思睿 钱承 邓俊泳 欧冉冉 李斌 轩庆红 于 2020-04-20 设计创作，主要内容包括：本发明公开了一种电机EMC测试加载系统,其特征在于：包括模拟加载设备,所述模拟加载设备通过传动机构与待测电机相连,用于向待测电机施加负载；供电系统用于向模拟加载设备、扭矩传感器和待测电机供能；控制系统用于控制模拟加载设备的制动力；扭矩传感器用于获取待测电机的转速和转矩数据信息并传输至监测系统；监测系统将接收到的转速和转矩数据信息传输至控制系统实时改变模拟加载设备输出的负载大小,形成闭环控制。本发明把具有可移动性的加载系统加入暗室内,不会引入额外的电磁骚扰,同时可满足电磁兼容测试标准对于辅助设备的要求,并且不需要对现有的电波暗室进行改造,满足了电机带载状态的EMC测试需求。(The invention discloses a motor EMC test loading system, which is characterized in that: the device comprises an analog loading device, wherein the analog loading device is connected with a motor to be tested through a transmission mechanism and is used for applying a load to the motor to be tested; the power supply system is used for supplying power to the analog loading equipment, the torque sensor and the motor to be tested; the control system is used for controlling the braking force of the analog loading equipment; the torque sensor is used for acquiring the rotating speed and torque data information of the motor to be detected and transmitting the rotating speed and torque data information to the monitoring system; the monitoring system transmits the received data information of the rotating speed and the torque to the control system to change the load output by the analog loading equipment in real time, so that closed-loop control is formed. The invention adds the loading system with mobility into the darkroom, does not introduce additional electromagnetic disturbance, can meet the requirements of electromagnetic compatibility test standards on auxiliary equipment, does not need to transform the existing anechoic chamber, and meets the EMC test requirements of the motor in a loading state.)

1. The utility model provides a motor EMC test loading system which characterized in that: the device comprises a simulation loading device, wherein the simulation loading device is connected with a motor (100) to be tested through a transmission mechanism (300) and is used for applying a load to the motor (100) to be tested;

the control system (402) is connected with the analog loading equipment and is used for controlling the braking force of the analog loading equipment;

the torque sensor (200) is arranged between the transmission mechanism (300) and the motor (100) to be detected, and is used for acquiring the rotating speed and torque data information of the motor (100) to be detected and transmitting the information to the monitoring system (201);

the power supply system (401) is used for supplying power to the analog loading equipment, the torque sensor (200) and the motor (100) to be tested;

and the monitoring system (201) is respectively connected with the output end of the torque sensor (200) and the input end of the control system (402), and transmits the received data information of the rotating speed and the torque to the control system (402) to change the load output by the analog loading equipment in real time so as to form closed-loop control.

2. The electro-mechanical EMC test loading system of claim 1, wherein: the analog loading device is an eddy current brake (400) with a cooling device.

3. The electro-mechanical EMC test loading system of claim 1, wherein: the transmission mechanism (300) is a belt wheel transmission mechanism and comprises a large belt wheel (301), a small belt wheel (302) and a transmission belt (303), the large belt wheel (301) is connected with an eddy current brake (400), the small belt wheel (302) is connected with the torque sensor (200), and the large belt wheel (301) is connected with the small belt wheel (302) through the transmission belt (303).

4. The electro-mechanical EMC test loading system of claim 1, wherein: and transmission shafts at two ends of the torque sensor (200) are respectively connected with the small belt pulley (302) and the motor (100) to be tested through a first coupler (203) and a second coupler (202).

5. The electro-mechanical EMC test loading system of claim 1, wherein: the eddy current brake (400), the large belt wheel (301) and the transmission belt (303) of the transmission mechanism (300) are arranged in the rack box body (500), and the torque sensor (200) and the small belt wheel (302) are arranged outside the rack box body (500).

6. The electro-mechanical EMC test loading system of claim 1, wherein: wave-absorbing materials are arranged on the outer surface of the rack box body (500), and a fixing device (501) used for mounting a motor (100) to be tested and a torque sensor (200) is arranged on the rack box body (500).

7. The electro-mechanical EMC test loading system of claim 6, wherein: the fixing device (501) is a T-shaped groove or a sliding rail.

8. The electro-mechanical EMC test loading system of claim 6, wherein: the bottom of the rack box body (500) is provided with a roller (502) with a positioning lock.

9. The electro-mechanical EMC test loading system of claim 1, wherein: when EMC test is carried out, the motor (100) to be tested, the torque sensor (200), the rack box body (500), the transmission mechanism (300) and the eddy current brake (400) are arranged in the anechoic chamber (600), and the power supply system (401), the control system (402) and the monitoring system (201) are located outside the anechoic chamber (600).

10. The electromechanical EMC test loading system of claim 9, wherein: the control system (402) and the monitoring system (201) both use a shielded wire as a signal transmission line and are connected into the anechoic chamber (600) through a wall interface board (AP) or a ground interface board (CP) of the anechoic chamber (600).

Technical Field

The invention relates to a motor EMC test loading system, and belongs to the field of electromagnetic compatibility tests.

Background

An electromagnetic compatibility (EMC) test of the new energy automobile is used as a test which influences the driving safety and reliability of the whole automobile, and is a key point of research and development, detection and authentication and industrial development of new energy automobile products. At present, electronic and electric parts and electric control parts mounted on automobiles must meet the radiation and conduction test requirements of automobile electronic electromagnetic compatibility tests including disturbance tests (EMI) and immunity tests (EMS). The electromagnetic compatibility test of the traditional automobile is mature at present in China, and the EMC test of new energy automobiles, particularly safety parts such as motors and batteries, is to be improved step by step.

The new energy automobile motor is required to be subjected to electromagnetic compatibility test in an on-load mode more and more, but the condition for carrying out the on-load test on the motor is lacked in a general EMC test anechoic chamber, and the existing method needs to modify the anechoic chamber.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the existing EMC test anechoic chamber lacks the condition of carrying out the on-load test by the motor.

In order to solve the above problems, the technical solution of the present invention is to provide a loading system for EMC testing of a motor, which is characterized in that: the device comprises an analog loading device, wherein the analog loading device is connected with a motor to be tested through a transmission mechanism and is used for applying a load to the motor to be tested;

the control system is connected with the analog loading equipment and is used for controlling the braking force of the analog loading equipment;

the torque sensor is arranged between the transmission mechanism and the motor to be detected and used for acquiring the rotating speed and torque data information of the motor to be detected and transmitting the rotating speed and torque data information to the monitoring system;

the power supply system is used for supplying power to the analog loading equipment, the torque sensor and the motor to be tested;

and the monitoring system is respectively connected with the output end of the torque sensor and the input end of the control system, and transmits the received rotating speed and torque data information to the control system to change the load output by the analog loading equipment in real time so as to form closed-loop control.

Preferably, the analog loading device is an eddy current brake with a cooling device.

Preferably, the transmission mechanism is a belt wheel transmission mechanism and comprises a large belt wheel, a small belt wheel and a transmission belt, the large belt wheel is connected with the eddy current brake, the small belt wheel is connected with the torque sensor, and the large belt wheel and the small belt wheel are connected through the transmission belt.

Preferably, transmission shafts at two ends of the torque sensor are respectively connected with the small belt wheel and the motor to be tested through a first coupler and a second coupler.

Preferably, the eddy current brake, the large belt wheel of the transmission mechanism and the transmission belt are arranged in the rack box body, and the torque sensor and the small belt wheel are arranged outside the rack box body.

Preferably, wave-absorbing materials are arranged on the outer surface of the rack box body, and a fixing device used for mounting a motor to be tested and the torque sensor is arranged on the rack box body.

Preferably, the fixing device is a T-shaped groove or a sliding rail.

Preferably, the bottom of the rack box body is provided with a roller with a positioning lock.

Preferably, when the EMC test is performed, the motor to be tested, the torque sensor, the rack box body, the transmission mechanism and the eddy current brake are all arranged in the anechoic chamber, and the power supply system, the control system and the monitoring system are located outside the anechoic chamber.

Preferably, the control system and the monitoring system both use a shielded wire as a signal transmission line, and are connected into the anechoic chamber through a wall interface board AP or a ground interface board CP of the anechoic chamber.

Compared with the prior art, the invention has the beneficial effects that:

the invention uses the eddy current brake as the load to provide braking force for the motor so as to meet the purpose of loading, uses the removable belt wheel mechanism as the transmission mechanism, can adapt to the motors with different torque and rotating speed ranges, simultaneously introduces the monitoring system to realize rotating speed conversion, adds the loading system with mobility into the darkroom, does not introduce extra electromagnetic disturbance into the provided system, can meet the requirements of electromagnetic compatibility test standards on auxiliary equipment, does not need to modify the existing darkroom, overcomes the defects of the prior art, and meets the EMC test requirements of the motor in a loading state under the condition of meeting the requirements of electromagnetic compatibility background noise.

Drawings

FIG. 1 is a schematic structural diagram of an EMC test loading system of a motor according to the present invention;

FIG. 2 is a schematic structural diagram of a torque sensor;

fig. 3 is a schematic structural diagram of a rack box body.

Detailed Description

In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

As shown in fig. 1, the EMC test loading system for the motor of the present invention includes an analog loading device, a torque sensor 200, a transmission mechanism 300, a power supply system 401, a control system 402, a monitoring system 201, and a rack case 500, in this embodiment, the analog loading device is an eddy current brake 400 with a cooling device, and the cooling device of the eddy current brake 400 includes one or more of an air cooling device, a water cooling device, and an oil cooling device, and is used for cooling the eddy current brake.

The eddy current brake 400 is respectively connected with a power supply system 401 and a control system 402, the power supply system 401 is connected with the motor 100 to be tested and the torque sensor 200 to supply power to the motor 100 to be tested, the torque sensor 200 and the eddy current brake 400, and the control system 402 is used for controlling the braking force of the eddy current brake 400, so that the working state required by the actual loading of the motor 100 to be tested is simulated. The eddy current brake 400 is connected with the motor 100 to be tested through the transmission mechanism 300 and is used for applying a load to the motor 100 to be tested; the transmission mechanism 300 is a belt wheel transmission mechanism and comprises a large belt wheel 301, a small belt wheel 302 and a transmission belt 303, the large belt wheel 301 is connected with the eddy current brake 400, the small belt wheel 302 is connected with the torque sensor 200, the large belt wheel 301 and the small belt wheel 302 are connected through the transmission belt 303, and the large belt wheel 301 provides torque for the small belt wheel 302 through the transmission belt 303. The large belt wheel 301, the small belt wheel 302 and the transmission belt 303 can be freely replaced in size according to actual needs so as to meet the requirements of transmission rotating speed and torque. The transmission shafts at the two ends of the torque sensor 200 are respectively connected with the small belt pulley 302 and the motor 100 to be detected through the first coupler 203 and the second coupler 202, the transmission shafts are used for acquiring the rotating speed and torque data information of the motor 100 to be detected and transmitting the rotating speed and torque data information to the monitoring system 201, the monitoring system 201 is respectively connected with the output end of the torque sensor 200 and the input end of the control system 402, and the received rotating speed and torque data information is transmitted to the control system 402, so that the working state of the motor 100 to be detected is ensured to meet the requirements.

The eddy current brake 400, the large pulley 301 and the driving belt 303 of the driving mechanism 300 are installed in the gantry housing 500, and the torque sensor 200 and the small pulley 302 are installed outside the gantry housing 500. Wave-absorbing materials are pasted on one side of the front face of the rack box body 500, a fixing device 501 is arranged on the upper surface of the rack box body and used for mounting the torque sensor 200 and the motor 100 to be tested, the fixing device 501 can be one of a T-shaped groove or a sliding rail device, and a roller 502 with a positioning lock is mounted at the bottom of the rack box body 500.

When the EMC test is carried out, the motor 100 to be tested, the torque sensor 200, the rack box 500, the transmission mechanism 300 and the eddy current brake 400 are all arranged in the anechoic chamber 600, and the power supply system 401, the control system 402 and the monitoring system 201 are positioned outside the anechoic chamber 600; the control system 402 and the monitoring system 201 both use shielded wires as signal transmission lines and are connected into the anechoic chamber 600 through a wall interface board AP or a ground interface board CP of the anechoic chamber 600.

When the motor 100 to be tested needs to be subjected to a loading test, a control instruction is input to the eddy current brake 400 with cooling through the control system 402, so that the eddy current brake 400 with cooling outputs a specified braking torque, and the torque is transmitted to the torque sensor 202 and the motor 100 to be tested through the transmission mechanism 300, so that the requirement of the loading test is met; when the rotating speed of the motor 100 to be tested needs to be changed, the real-time rotating speed and torque information is fed back to the monitoring system 201 through the torque sensor 202, data are provided for experimenters, meanwhile, the monitoring system 201 sends the information to the control system 402, the output torque of the eddy current brake 400 is changed in real time, closed-loop control is formed, and therefore the load change requirement in the testing process is met.