Equipment and method for measuring relative position of two rotors of double-salient type double-rotor motor
A dual-rotor motor, relative position technology, applied in the direction of using electric/magnetic devices to transmit sensing components, can solve the problems of complex detection system, high cost of detection devices, and high resolution of resolvers, and simplify the signal conditioning circuit. , high cost and satisfactory detection accuracy
Inactive Publication Date: 2013-06-26
JIANGSU UNIV
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Chinese patent application No. 201010604357.2 discloses a method for measuring the relative rotation angle and speed of two rotors of a coaxial dual-rotor motor and a sensor for realizing the method. The resolution of the resolver used in this method is high, and its output is an analog signal. Performing analog-to-digital conversion, the subsequent decoding and difference-seeking circuits also complicate the detection system, and the cost of the detection device is relatively high
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[0020] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0021] Since the middle rotor and the inner rotor of the doubly salient double rotor motor are both rotating parts, the relative position of the two rotors cannot be directly measured by the existing sensors. Therefore, the present invention selects Hall position sensors and incremental photoelectric encoders. A combination of sensors to complete the measurement of the relative angular displacement of the two rotors.
[0022] see figure 1 , The position sensor of the intermediate rotor of the motor adopts the Hall position detection device 1-1. The position sensor of the inner rotor adopts an incremental photoelectric encoder 1-2, and the incremental photoelectric encoder 1-2 is installed on the inner rotor rotating shaft 1-4.
[0023] see Figure 1-2 The Hall position detection device 1-1 includes a Hall switch circuit 2-2 and matching N-S...
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The invention discloses equipment and a method for measuring relative position of two rotors of a double-type-salient type double-rotor motor. An incremental photo-electricity encoder is arranged on a revolving shaft of an inner rotor, a Hall position detection device is arranged on the middle rotor, number of Hall switching circuits is equal to a motor phase number M, and logarithm of magnet rings arranged from N to S alternatively is equal to motor rotor series R; and M Hall switch circuits are evenly distributed in a stator along peripheral direction of the stator, R pairs of the magnetic rings arranged from N to S alternatively are sleeved on the revolving shaft of the middle rotor. By the adoption of a Hall position sensor, position measuring of the middle rotor corresponding to the stator is realized, and angular displacement theta m of the middle rotor corresponding to the stator is obtained; position angles of the middle rotor corresponding to the inner rotor is calculated through the angular displacement theta m of the inner rotor corresponding to the stator being measured by the incremental photo-electricity encoder; and cost performance of a complete set of the measuring equipment is improved, and requirements for measuring precision are met.
Description
technical field [0001] The invention relates to a method for measuring the relative angular displacement of two rotors of a double-salient-pole double-rotor motor, and belongs to the field of motor position detection. Background technique [0002] Dual-rotor motor is one of the key components of hybrid electric vehicles. Effective control of a dual-rotor motor requires sensing the relative angular displacement of the two rotors. At present, the commonly used measurement method is based on two resolver devices, respectively detects the angular position of the two rotors relative to the motor stator, and then calculates the difference through the difference circuit to obtain the relative angular displacement and speed difference of the dual rotors. Chinese patent application number 201010604357.2 discloses a method for measuring the relative rotation angle and speed of two rotors of a coaxial dual-rotor motor and a sensor for realizing the method. The resolution of the resolv...
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IPC IPC(8): G01D5/56
Inventor 陈云云全力朱孝勇莫里红姚雪峰
Owner JIANGSU UNIV