Method to control an electric motor with adjustment of the value of the equivalent impedance
US-2017088126-A1 · Mar 30, 2017 · US
Method of controlling electric oil pump
US10840847B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10840847-B2 |
| Application number | US-201816121858-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 5, 2018 |
| Priority date | Dec 19, 2017 |
| Publication date | Nov 17, 2020 |
| Grant date | Nov 17, 2020 |
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- Title
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Abstract
Official abstract text for this publication.
A method of controlling an electric oil pump driven by a motor, may include changing, by a controller, a frequency of a current applied to the motor with a predetermined control cycle to control RPM of the motor to instantaneously change into a different value according to a frequency change.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of controlling an electric oil pump driven by a motor, the method comprising: changing, by a controller, a frequency of a current applied to the motor with a predetermined control cycle to control revolution per minute (RPM) of the motor to change into a different value according to a frequency change, wherein the controller includes a current controller, wherein a target motor current determined by using a torque map providing a relation between a target motor torque and the target motor current, and a current control command in which a level and a direction of the current applied to the motor is changed irregularly, are superimposed and input to the current controller, wherein the current controller converts the superimposed target motor current into a voltage signal, and provides the voltage signal to a pulse width modulation (PWM) inverter, and wherein the PWM inverter converts the voltage signal to a PWM signal and provides the PWM signal to the motor. 2. The method of claim 1 , wherein the frequency of the current is determined by the RPM of the motor and a number of vanes of a rotor of the electric oil pump. 3. The method of claim 2 , wherein a number of times that the frequency of the current is changed is equal to or less than the number of vanes forming the rotor of the electric oil pump. 4. The method of claim 1 , wherein the controller includes a speed controller, and wherein when a target motor speed for generating a target oil pressure required to drive an engine is input to the speed controller, the speed controller determines the target motor torque corresponding to the target motor speed.
Assignees
Inventors
Classifications
Silencing (gas-flow silencers or exhaust apparatus for machines or engines in general F01N) · CPC title
with vanes reciprocating with respect to the inner member · CPC title
of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member · CPC title
Rotary pumps · CPC title
Electrical pumps · CPC title
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- What does patent US10840847B2 cover?
- A method of controlling an electric oil pump driven by a motor, may include changing, by a controller, a frequency of a current applied to the motor with a predetermined control cycle to control RPM of the motor to instantaneously change into a different value according to a frequency change.
- Who is the assignee on this patent?
- Hyundai Motor Co Ltd, Kia Motors Corp
- What technology area does this patent fall under?
- Primary CPC classification F01M1/02. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Nov 17 2020 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).