Torque-sensor-free iron loss experimental measurement method for high-speed electro-magnetic motor

A measurement method and electric excitation technology, applied in the direction of motor generator testing, measuring electricity, measuring devices, etc., can solve the problem that the shaft power cannot calculate the iron loss, and achieve the effect of correcting the iron loss model parameters

Inactive Publication Date: 2021-07-09
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0007] In order to solve the problems in the prior art, the present invention provides an experimental measurement method for the iron loss of a high-speed electrically excited motor without a torque sensor that effectively avoids the problem that the lack of a high-speed torque sensor cannot measure the shaft power and the iron loss cannot be calculated

Method used

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  • Torque-sensor-free iron loss experimental measurement method for high-speed electro-magnetic motor
  • Torque-sensor-free iron loss experimental measurement method for high-speed electro-magnetic motor
  • Torque-sensor-free iron loss experimental measurement method for high-speed electro-magnetic motor

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Embodiment

[0035] figure 1 For this embodiment, the system block diagram of the high-speed electric excitation motor adopting the iron loss experiment measurement method without torque sensor, the specific implementation steps are as follows:

[0036] (1) Acquisition of position and rotational speed signals: the rotary transformer is used to acquire the rotor position signal θ, the rotor position angle signal is sent to the motor controller, and the motor rotational speed n is calculated through the pre-written controller program;

[0037] (2) Power converter: The power converter uses a three-phase full-bridge inverter circuit to provide drive for the motor. When the motor is running without load, detect the speed n and the armature current I A , I B , I C The signal is sent to the motor controller, and the digital signal processor provides PWM wave signals to the power converter through the amplified isolation circuit according to the current operating conditions to control the openi...

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Abstract

The invention discloses a torque-sensor-free iron loss experimental measurement method for a high-speed electro-magnetic motor, and belongs to the technical field of motor testing. According to the method, the method comprises the steps of: when the electro-magnetic motor is in no-load high-speed operation, disconnecting an armature winding, reducing the rotating speed of the motor along with time, fitting the function relation between the rotating speed and the time, calculating the function relation between kinetic energy and the time, and therefore the rotor loss at any moment can be obtained through derivation; gradually increasing the exciting current from 0, repeating the operation to obtain the total loss under different exciting currents, and eliminating the mechanical loss measured when the exciting current is 0 to obtain the iron loss value under the corresponding exciting current; and comparing with finite element simulation data, and correcting iron loss model parameters, so that iron loss values under different working conditions can be calculated. The problems that a torque sensor needs to measure the input power of the prime mover, the applicable rotating speed of the torque sensor is limited, installation is difficult, and detection errors are caused by the load effect are solved.

Description

technical field [0001] The invention relates to an experimental measurement method for the iron loss of a high-speed electric excitation motor without a torque sensor, belonging to the technical field of motor testing. Background technique [0002] The high speed of the motor can reduce the volume weight of the motor and increase its power density. It has the characteristics of being directly connected to high-speed loads, eliminating the need for traditional mechanical speed-up devices, reducing system noise and improving system transmission efficiency. It is used in high-speed grinding machines, Air cycle refrigeration systems, energy storage flywheels, fuel cells, high-speed centrifugal compressors for natural gas transmission, and distributed power generation systems as aircraft or shipboard power supply equipment have broad application prospects, and have become one of the research hotspots in the international electrical field. . [0003] However, when the electric ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/34G06F30/23G06F30/17
CPCG01R31/343G06F30/17G06F30/23
Inventor 张健蒋昊哲张卓然于立李进才
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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