Positioning device and control method thereof
US-2024283380-A1 · Aug 22, 2024 · US
Motor drive apparatus and discharge control method of the same
US9385643B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9385643-B2 |
| Application number | US-201314430143-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 16, 2013 |
| Priority date | Oct 19, 2012 |
| Publication date | Jul 5, 2016 |
| Grant date | Jul 5, 2016 |
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Abstract
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An object is to perform discharge of a capacitor using a motor without rotating the motor even when connected to a position sensorless motor. The motor drive apparatus calculates a voltage pulse width at which a motor does not rotate or vibrate using a both-end voltage of a smoothing capacitor and an inductance estimation value of the motor, and applies a voltage with the voltage pulse width to the motor to calculate an inductance. Then, a rotor position is estimated using the inductances calculated for individual switching patterns. A motor current is caused to flow on the basis of the estimated rotor position to perform discharge of charge accumulated in the smoothing capacitor.
First claim
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The invention claimed is: 1. A motor drive apparatus comprising: an inverter that converts DC power into three-phase AC power to be supplied to a motor; a capacitor provided on an input side of the inverter; a control apparatus that controls the inverter; and a current sensor that detects a motor current, wherein the control apparatus includes a rotor position estimation unit that estimates a rotor position of the motor after operation of the motor is stopped, and a di…
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- What does patent US9385643B2 cover?
- An object is to perform discharge of a capacitor using a motor without rotating the motor even when connected to a position sensorless motor. The motor drive apparatus calculates a voltage pulse width at which a motor does not rotate or vibrate using a both-end voltage of a smoothing capacitor and an inductance estimation value of the motor, and applies a voltage with the voltage pulse width to…
- Who is the assignee on this patent?
- Mitsubishi Heavy Ind Automotive Thermal Sys Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H02P6/24. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jul 05 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).