Motor drive device, and control method
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorTOMOYA HOSOKAWA
Life of this patent
Estimating the term…
Abstract
A decrease in reliability due to heat during operation of a dynamic brake is prevented. Motor drive device includes first controller, second controller, and dynamic brake. First controller controls first motor. Second controller controls second motor. Second motor cools at least one of heat generator and heat radiator. Dynamic brake, which includes resistors connected among terminals of first motor, short-circuits terminals to cause resistors to consume kinetic energy of first motor to stop first motor. While first motor is controlled to be in a standby state, second controller changes the rotation speed of second motor according to the rotation speed of first motor. Heat generator includes resistors.
Claims10
A motor drive device comprising:
- a heat generator that is provided in an inside of the motor drive device and generates heat due to rotation of a first motor;
- a first controller that is provided in the inside and is configured to drive and control the first motor;
- a second controller that is provided in the inside and is configured to drive and control a second motor that cools the inside;
- and
- a dynamic brake that is provided in the inside and includes a resistor electrically connected between terminals of the first motor, the dynamic brake being configured to short-circuit the terminals to cause the resistor to consume heat of kinetic energy of the first motor to stop the first motor,
- wherein the second controller controls a rotation speed of the second motor to change according to a rotation speed of the first motor while the first motor is controlled to be in a standby state, and
- the heat generator includes the resistor.
A method for controlling a motor drive device, the method comprising:
- a first control step of driving and controlling a first motor;
- a second control step of driving and controlling a second motor for cooling at least one of a heat generator that generates heat due to rotation of the first motor and a heat radiator that radiates the heat of the heat generator;
- and
- a stop control step of stopping the first motor by causing a dynamic brake that includes a resistor electrically connected between terminals of the first motor to short-circuit the terminals to cause heat of kinetic energy of the first motor to be consumed by the resistor,
- wherein in the second control step, while the first motor is controlled to be in a standby state, a rotation speed of the second motor is controlled to change according to a rotation speed of the first motor, and
- the heat generator includes the resistor.
(canceled)
Dependencies are inferred from the claim text.