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

A motor drive control and motor drive technology, which is applied in the direction of rotation direction control, electronic commutator, etc., can solve the problems of difficult zero-cross detection, estimation of rotation direction, etc., and achieve the effect of simple structure

Pending Publication Date: 2022-04-08
MINEBEA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

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no. 1 approach

[0043] First, the motor drive control device and the control method of the motor drive control device according to the first embodiment will be described.

[0044] figure 1 It is a diagram roughly showing the circuit configuration of the motor drive control device 1 according to the first embodiment.

[0045] The motor drive control device 1 drives the motor 20 . In this embodiment, the motor 20 is, for example, a three-phase brushless motor. The motor drive control device 1 rotates the motor 20 by periodically passing a drive current to the armature coils Lu, Lv, and Lw of the motor 20 .

[0046] The motor drive control device 1 has a motor drive unit 2, a control circuit unit 3, a first Hall element H1, and a second Hall element H2 (H1 and H2 are sometimes simply referred to as Hall elements). also, figure 1 The components of the shown motor drive control device 1 are part of the whole, and the motor drive control device 1 is in figure 1 In addition to the components sh...

no. 2 approach

[0084] Next, the motor drive control device and the control method of the motor drive control device according to the second embodiment will be described.

[0085] Figure 8 It is a block diagram showing the configuration of the control circuit unit 3A of the second embodiment.

[0086] In the motor drive control device 1 of the first embodiment, the Hall signal H1 is input to the rotational position detection unit 36 ​​. + 、H1 － , H2 － , and in the motor drive control device 1A of this embodiment, the difference lies in that Figure 8 As shown, in addition to the input Hall signal H1 in the rotation position detection part 36 + 、H1 － , H2－ In addition, a reference voltage having a predetermined potential (an example of a comparison signal to be compared) is also input. In addition, the difference is that the rotation direction determination unit 37A compares the variation of the first position detection signal S5 and the variation of the second position detection signal...

no. 3 approach

[0096] Next, the motor drive control device and the control method of the motor drive control device according to the third embodiment will be described.

[0097] Figure 11 It is a block diagram showing the configuration of the control circuit unit 3B of the third embodiment.

[0098] In the motor drive control devices 1 and 1A of the above-described embodiments, one of the first position detection signal S5 and the second position detection signal S6 received from the rotational position detection unit 36 ​​by the rotation direction determination units 37 and 37A is When the output of the output changes, according to the direction of the change (from "0" to "1", or from "1" to "0"), and another position detection signal S5 or The comparison result of the output of S6 (whether it is "0" or "1") determines the rotation direction of the motor. In the motor drive control device 1B of the present embodiment, the rotation direction determination unit 37B compares the variation o...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/16H02P6/30
CPCH02P6/16H02P6/17
Inventor 青木政人铃木贵大佐久间智敬
Owner MINEBEA CO LTD
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