US 12,294,327 B2
Electromagnetic brake control device and control device
Takao Uemura, Kusatsu (JP); Ryuichi Jimbo, Kusatsu (JP); and Masakazu Matsugami, Ritto (JP)
Assigned to OMRON CORPORATION, Kyoto (JP)
Appl. No. 17/285,658
Filed by OMRON Corporation, Kyoto (JP)
PCT Filed Nov. 7, 2019, PCT No. PCT/JP2019/043724
§ 371(c)(1), (2) Date Apr. 15, 2021,
PCT Pub. No. WO2020/110652, PCT Pub. Date Jun. 4, 2020.
Claims priority of application No. 2018-222608 (JP), filed on Nov. 28, 2018.
Prior Publication US 2021/0399659 A1, Dec. 23, 2021
Int. Cl. H02P 3/04 (2006.01); F16D 63/00 (2006.01); G05B 9/03 (2006.01); F16D 121/18 (2012.01); F16D 121/20 (2012.01); H02P 29/024 (2016.01)
CPC H02P 3/04 (2013.01) [F16D 63/002 (2013.01); G05B 9/03 (2013.01); F16D 2121/18 (2013.01); F16D 2121/20 (2013.01); H02P 29/024 (2013.01)] 4 Claims
OG exemplary drawing
 
4. A control apparatus for controlling an on-off state of power to a control target, the apparatus comprising:
an output terminal connectable to the control target;
a power disconnect switch configured to connect and disconnect between a power supply for the control target and an internal power supply;
a normal calculator configured to output, in response to an input of a normal command carrying an instruction to supply power to the control target under normal control, a normal control signal to control the power disconnect switch to be on, and output, in response to an input of the normal command carrying an instruction to stop power supply to the control target under the normal control, the normal control signal to control the power disconnect switch to be off;
a first output switch and a second output switch each connected to the output terminal and the internal power supply to form a current path to allow a current to flow from the internal power supply to the control target in response to the first output switch and the second output switch being on;
a first safety calculator configured to output, in accordance with a safety control command, a first safety control signal to control an on-off state of the first output switch, and to detect a failure in the second output switch; and
a second safety calculator configured to output, in accordance with the safety control command, a second safety control signal to control an on-off state of the second output switch, and to detect a failure in the first output switch,
wherein in response to the power disconnect switch being controlled to be on, the first safety calculator operates in a first safety control state to monitor the second output switch for the failure in the second output switch and enters, upon detecting the failure in the second output switch, a first resetting state in which the first safety calculator continues to output the first safety control signal to control the first output switch to be off until a predetermined resetting operation is performed on the control apparatus, and in response to the power disconnect switch being controlled to be off, the first safety calculator operates in a first normal control state of being unable to detect the failure in the second output switch or being unable to enter the first resetting state in response to detecting the failure detected in the second output switch, and
in response to the power disconnect switch being controlled to be on, the second safety calculator operates in a second safety control state to monitor the first output switch for the failure in the first output switch and enters, upon detecting the failure in the first output switch, a second resetting state in which the second safety calculator continues to output the second safety control signal to control the second output switch to be off until the predetermined resetting operation is performed, and in response to the power disconnect switch being controlled to be off, the second safety calculator operates in a second normal control state of being unable to detect the failure in the first output switch or being unable to enter the second resetting state in response to detecting the failure detected in the first output switch.