Efficiency test system and control method for no-angle sensor of permanent magnet synchronous motor

An angle sensorless, permanent magnet synchronous motor technology, used in motor generator testing, electrical program control, program control in sequence/logic controllers, etc., can solve problems such as no angle sensor, increased system cost, and limited application , to achieve the effect of saving system cost, convenient load adjustment and cost saving

Inactive Publication Date: 2012-08-22
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

However, when this method is used for the efficiency test of the permanent magnet synchronous motor, the angle sensor must be used to complete the control of the tested motor and the test motor
This increases the cost of the system
In addition, for some high-speed permanent magnet synchronous motors, there is no suitable angle sensor
These limit the application of this method

Method used

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Embodiment Construction

[0014] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.

[0015] Such as figure 1 As shown, the hardware structure of a permanent magnet synchronous motor without angle sensor efficiency test system includes a control module 1, a power analyzer 4, a rectifier module 2, a DC bus bar 9, a main inverter module 5, an auxiliary inverter module 4, Accompanying the test motor 7, the torque meter 8, and the motor under test 10, the input end of the rectification module 2 is connected to the three-phase or single-phase alternating curre...

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Abstract

The invention discloses an efficiency test system and a control method for a no-angle sensor of a permanent magnet synchronous motor. Motor efficiency test load experiments are carried out in a two-motor counter dragging mode. During test, an accompanying test motor works at the fourth quadrant by a no-sensor control method, and in addition, the electric energy sent by the motor is fed back to the direct current bus part. For a permanent magnet motor with medium and high power, energy sources consumed by the efficiency test are greatly saved, and the pollution cannot be generated to an electric network; and in addition, the torque of the accompanying test motor is regulated through closed loop control, so the regulation range is wide, and stability and reliability are realized.

Description

technical field [0001] The invention belongs to a motor efficiency test system, which is suitable for the efficiency test of a permanent magnet synchronous motor. Background technique [0002] At present, the test methods of motor efficiency and loss are not uniform in the world. More authoritative ones include the American IEEE112 standard, the International Electrotechnical Commission's IEC34 standard and the Japanese JEC standard. These methods all require load testing of the motor, thus requiring the test system to have loading equipment. Traditional loading schemes include: dynamic braking method; DC motor load method; frequency conversion generator set feedback method, etc. Among them, the energy consumption braking method is the most commonly used method, and mechanical brakes, eddy current brakes and magnetic powder brakes all belong to the energy consumption braking method. When this type of equipment is used for high-speed motors, a mechanical deceleration devic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/34G05B19/04
Inventor 纪历徐龙祥
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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