Motor drive control device and method for controlling motor drive control device

Abstract

The invention provides a motor drive control device and a control method of the motor drive control device, which can reduce lead-out wires led out from a position sensor, is simple in structure, and can determine the rotation direction of a motor. A control circuit unit (3) of a motor drive control device (1) has a first comparator (C1) for generating a first position detection signal (S5) by comparing the magnitude of a first positive Hall signal (H +) output from a first Hall element (H1) with the magnitude of a first negative Hall signal (H-), and a second negative Hall signal (H2-) output from a second Hall element (H2). A second comparator (C2) that generates a second position detection signal (S6) by comparing the magnitude with the magnitude of the first negative Hall signal (H-); and a rotation direction determination unit (37) that determines the rotation direction of the motor (20) by comparing the variation of the first position detection signal (S5) with the variation of the second position detection signal (S6).

Description

technical field [0001] The invention relates to a motor drive control device and a control method of the motor drive control device. Background technique [0002] Conventionally, as a method of discriminating the direction of rotation of a polyphase motor having, for example, three phases, the following methods of discriminating the direction of rotation using induced voltage are known: a method of discriminating based on an induced voltage generated by a winding when the motor rotates, Or a method of making a judgment based on a magnetic sensor and an induced voltage, or the like. [0003] Also, Patent Document 1 discloses a control device for a sensorless brushless motor that monitors an induced voltage to estimate a rotor position, and switches energized phases based on an estimation result of the estimated rotor position. In the case of the non-position sensing method as in Patent Document 1, the direction of rotation can be determined from the induced voltage when no p...

AI Technical Summary

Problems solved by technology

In the case of the non-position sensing method as in Patent Document 1, the direction of rotation can be determined from the induced voltage when no power is applied, or when the power is applied in an accurate energization pattern, but the energization pattern and the rotation direction are different when the power is applied. When the directions do not match, it is difficult to perform zero cross detection, and it is difficult to estimate the rotation direction from the induced voltage

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