Rotor position detection device of four-phase switched reluctance motor

Abstract

The invention discloses a rotor position detection device of a four-phase switched reluctance motor. There is only one code disc linked with an electronic rotor and one detection sensor for detecting the code disc. Six cyclic detection groups are arranged at the periphery of the code disc. Each detection group comprises a convex detection part formed by a first mechanical angle or a second mechanical angle and a concave detection part formed by the first mechanical angle or the second mechanical angle through arrangement. The detection sensor outputs a corresponding high level or low level detection signal to the convex detection parts or the concave detection parts in the detection groups, the detection signal passes through a sensor signal coding module, a coding signal processing module and a phase output logic module and the phase commutation logic signal of the four-phase switched reluctance motor is outputted. Detection of the motor rotor position can be realized by only one code disc and the hardware cost can be reduced and the detection reliability can be enhanced.

Description

technical field [0001] The invention relates to a four-phase switched reluctance motor, in particular to a rotor position detection device for the switched reluctance motor. Background technique [0002] Switched reluctance motors belong to synchronous motors. In the process of controlling the rotation of switched reluctance motors, it is necessary to detect the position of the rotor relative to the stator to obtain the corresponding conduction phase logic and correctly control the commutation logic so that the switched reluctance motor can normal operation. In low-cost applications, two position sensors are used to detect the four-phase switched reluctance motor to obtain the angular position of the rotor relative to the stator. Such as figure 1 As shown, for a four-phase, 8 / 6-structure switched reluctance motor (8 stator poles, 6 rotor poles), two position sensors are often used for detection, where S1 and S2 are position detection devices with an interval of 15° mechan...

AI Technical Summary

Problems solved by technology

However, this method requires the use of two sensor devices, which increases the cost of hardware, and the use of two sensor devices also increases the probability of sensor failure. In addition, when there are interference signals entering, it increases the difficulty of fault judgment

In some occasions that require low cost and high reliability, it is difficult to meet the demand

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