Control device, conveyance device, electric cylinder, and storage medium

Patent metadata

Field	Value
Publication number	US-11855574-B2
Application number	US-202217848817-A
Country	US
Kind code	B2
Filing date	Jun 24, 2022
Priority date	Mar 5, 2020
Publication date	Dec 26, 2023
Grant date	Dec 26, 2023

Abstract

A control device includes first and second input terminals to which a DC voltage for driving a motor is input, and a control unit. The control unit sets a rotation direction of the motor based on first input to the first input terminal or the second input terminal. A rotation speed of the motor is changed based on a subsequence input of the DC voltage.

First claim

What is claimed is:

1. A control device of a motor, comprising:
a first input terminal and a second input terminal to which a DC voltage for driving the motor is input; and
a control unit configured to control the motor,
wherein
the control unit executes:
first input confirmation processing of confirming first input of the DC voltage to the first input terminal or the second input terminal;
rotation direction setting processing of, when the first input to one input terminal of the first input terminal and the second input terminal is confirmed by the first input confirmation processing, setting a rotation direction of the motor based on which input terminal receives the DC voltage;
operation processing of operating the motor at a first rotation speed in the rotation direction set by the rotation direction setting processing;
second input confirmation processing of confirming second input of the DC voltage to the other input terminal of the first input terminal and the second input terminal; and
speed change processing of, when the second input to the other input terminal is confirmed by the second input confirmation processing, changing the rotation speed of the motor from the first rotation speed to a second rotation speed;
wherein in the second input confirmation processing,
when an input of a positive voltage to both the first input terminal and the second input terminal is continuing for a predetermined time, it is confirmed that the second input is performed.

2. The control device according to claim 1 , wherein
the control device further comprises a ground terminal,
the DC voltage is applied to the ground terminal and one of the first input terminal and the second input terminal,
the first input confirmation processing and the rotation direction setting processing are executed by inputting a positive voltage, and
a drive voltage is supplied to the motor during supply of the positive voltage to the first input terminal and/or the second input terminal.

3. The control device according to claim 2 , further comprising a drive circuit configured to drive the motor,
wherein the control unit further comprises:
a first output terminal configured to output the DC voltage for drive of the motor to the drive circuit; and
a second output terminal configured to output a control signal to the drive circuit.

4. The control device according to claim 2 , wherein
in the first input confirmation processing,
when the input of the positive voltage to one terminal of the first input terminal and the second input terminal is continuing for a predetermined time, it is confirmed that the first input is performed.

5. A conveyance device comprising
a conveyance unit configured to convey a conveyance target object in a conveyance direction, and
a drive unit configured to drive the conveyance unit,
wherein the drive unit includes
a motor;
a control device according to claim 1 ;
a first support portion configured to support the motor; and
a second support portion configured to support the control device.

6. An electric cylinder including a motor, a rod configured to be moved forward and backward by a driving force of the motor, an electromagnetic brake configured to resist rotation of the motor at the time of non-energization, and a control device according to claim 5 and configured to control the motor, the electric cylinder comprising
a housing configured to internally store the motor, the electromagnetic brake, and the control device and support the rod such that the rod is movable forward and backward,
wherein the housing comprises:
a first support portion configured to support the motor and the electromagnetic brake; and
a second support portion configured to support the control device, and
the control device further comprises a connecting portion to which the electromagnetic brake is connected.

7. A control device of a motor, comprising:
a first input terminal and a second input terminal to which a DC voltage for driving the motor is input; and
a control unit configured to control the motor,
wherein
the control unit executes:
first input confirmation processing of confirming first input of the DC voltage to the first input terminal or the second input terminal;
rotation direction setting processing of, when the first input to one input terminal of the first input terminal and the second input terminal is confirmed by the first input confirmation processing, setting a rotation direction of the motor based on which input terminal receives the DC voltage;
operation processing of operating the motor at a first rotation speed in the rotation direction set by the rotation direction setting processing;
second input confirmation processing of confirming second input of the DC voltage to the other input terminal of the first input terminal and the second input terminal; and
speed change processing of, when the second input to the other input terminal is confirmed by the second input confirmation processing, changing the rotation speed of the motor from the first rotation speed to a second rotation speed,
the control device further comprises a ground terminal,
the DC voltage is applied to the ground terminal and one of the first input terminal and the second input terminal,
the first input confirmation processing and the rotation direction setting processing are executed by inputting a positive voltage,
a drive voltage is supplied to the motor during supply of the positive voltage to the first input terminal and/or the second input terminal,
the control device further comprises an input unit configured to set the first rotation speed,
the motor is a brushless DC motor, and
in the speed change processing, the rotation speed of the motor is changed to the second rotation speed lower than the first rotation speed set by the input unit.

8. A control device of a motor, comprising:
a first input terminal and a second input terminal to which a DC voltage for driving the motor is input; and
a control unit configured to control the motor,
wherein
the control unit executes:
first input confirmation processing of confirming first input of the DC voltage to the first input terminal or the second input terminal;
rotation direction setting processing of, when the first input to one input terminal of the first input terminal and the second input terminal is confirmed by the first input confirmation processing, setting a rotation direction of the motor based on which input terminal receives the DC voltage;
operation processing of operating the motor at a first rotation speed in the rotation direction set by the rotation direction setting processing;
second input confirmation processing of confirming second input of the DC voltage to the other input terminal of the first input terminal and the second input terminal; and
speed change processing of, when the second input to the other input terminal is confirmed by the second input confirmation processing, changing the rotation speed of the motor from the first rotation speed to a second rotation speed,
after the speed change processing, during continuation of the input to one terminal of the first input terminal and the second input terminal, the control unit maintains the rotation speed of the motor at the second rotation speed independently of presence/absence of confirmation of the second input.

9. A control device of a motor, comprising:
a first input terminal and a second input terminal to which a DC voltage for driving the motor is input; and
a control unit configured to control the motor,
wherein
the control unit executes:
first input confirmation processing of confirming first input of the DC voltage to the first input terminal or

Assignees

• Hirata Spinning

Inventors

• Arita Naoto
• Nishimoto Satoshi
• Nakano Koichi

Classifications

• H02P6/30 Primary

  Arrangements for controlling the direction of rotation (H02P6/22 takes precedence) · CPC title

• B65G13/06

  Roller driving means · CPC title

• H02P6/00

  Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor (vector control H02P21/00) · CPC title

• H02P6/20

  Arrangements for starting (H02P6/08 takes precedence) · CPC title

• B65G2203/0291

  Speed of the load carrier · CPC title