JP2018042336A5

JP2018042336A5 -

Info

Publication number: JP2018042336A5
Application number: JP2016173592A
Authority: JP
Filing date: 2016-09-06
Publication date: 2018-06-14
Anticipated expiration: 2036-09-06

Description

実施形態の同期電動機の回転位置推定装置は、同期電動機の相電流を検出する電流検出部と、前記同期電動機の回転位置に追従するように３相のＰＷＭ信号パターンを生成するＰＷＭ生成部と、前記ＰＷＭ信号の搬送波に基づいて、検出タイミング信号を生成する検出タイミング信号生成部と、前記検出タイミング信号に応じて、前記電流検出部により検出される相電流の変化量を求める電流変化量検出部と、前記相電流の変化量に基づいて、前記同期電動機の回転位置を推定する回転位置推定部とを備える。 Rotational position estimation device for a synchronous motor of the embodiment, a PWM generating unit for generating a current detection unit for detecting a phase current of the synchronous motor, a PWM signal pattern of the three phases so as to follow the rotational position of said synchronous motor A detection timing signal generation unit that generates a detection timing signal based on the carrier wave of the PWM signal, and a current change amount detection that calculates a change amount of the phase current detected by the current detection unit according to the detection timing signal And a rotational position estimating unit that estimates the rotational position of the synchronous motor based on the amount of change in the phase current.

以上の構成において、モータ２，インバータ回路３を除いたものが、回転位置検出装置１３を構成している。そして、回転位置検出装置１３にインバータ回路３を加えたものがモータ制御装置１４を構成している。
In the above configuration, the motor 2, excluding the inverter circuit 3 constitute the rotational position detection device 13. A motor control device 14 is configured by adding the inverter circuit 3 to the rotational position detection device 13.

Claims

A current detector for detecting a phase current of the synchronous motor,
A PWM generator that generates a three-phase PWM signal pattern to follow the rotational position of the synchronous motor;
A detection timing signal generation unit that generates a detection timing signal based on the carrier wave of the PWM signal;
In response to the detection timing signal, a current change amount detection unit for obtaining a change amount of the phase current detected by the current detection unit;
A rotational position estimation unit that estimates the rotational position of the synchronous motor based on the amount of change in the phase current;
The PWM generator detects the current change amount detector in three types of voltage vector periods according to the six fixed detection timing signals generated by the detection timing signal generator within one period of the carrier wave. A synchronous motor rotational position estimation device that generates a three-phase PWM signal pattern so that a corresponding phase current change amount can be detected.

A synchronous motor,
An inverter circuit for driving the synchronous motor by converting a direct current into a three-phase alternating current by controlling on / off of a plurality of switching elements connected in a three-phase bridge according to a predetermined PWM signal pattern;
An air conditioner comprising the rotational position estimation device according to any one of claims 1 to 4 and performing an air conditioning operation by a rotational driving force generated by the synchronous motor.

A synchronous motor,
An inverter circuit for driving the synchronous motor by converting a direct current into a three-phase alternating current by controlling on / off of a plurality of switching elements connected in a three-phase bridge according to a predetermined PWM signal pattern;
A washing machine comprising the rotational position estimation device according to any one of claims 1 to 4 and performing a washing operation by a rotational driving force generated by the synchronous motor.