Variable frequency drive thermal management

Patent metadata

Field	Value
Publication number	US-2021234497-A1
Application number	US-201915734638-A
Country	US
Kind code	A1
Filing date	Oct 29, 2019
Priority date	Nov 5, 2018
Publication date	Jul 29, 2021
Grant date	—

Abstract

A system and method for thermal management in a variable frequency drive is provided. Aspects include receiving, by a processor, operational data associated with a variable frequency drive, the operational data including one or more operational parameters for the variable frequency drive, comparing the one or more operational parameters to a threshold, and operating the variable frequency drive to produce a first modulated output based at least in part on the one or more operational parameters being below the threshold.

First claim

What is claimed is:

1 . A method for thermal management in a variable frequency drive, the method comprising:
receiving, by a processor, operational data associated with a variable frequency drive, the operational data comprising one or more operational parameters for the variable frequency drive; comparing the one or more operational parameters to a threshold; and operating the variable frequency drive to produce a first modulated output based at least in part on the one or more operational parameters being below the threshold.

2 . The method of claim 1 , further comprising:
operating the variable frequency drive to produce a second modulated output based at least in part on at least one of the one or more operational parameters exceeding the threshold.

3 . The method of claim 1 , wherein the first modulated output comprises a space vector pulse width modulation (SVPWM) output.

4 . The method of claim 2 , wherein the second modulated output comprises a discontinuous pulse width modulation (DPWM) output.

5 . The method of claim 2 , wherein the second modulated output is produced by the variable frequency drive for a first time period.

6 . The method of claim 5 , further comprises:
operating the variable frequency drive to produce the first modulated output in response to an expiration of the first time period.

7 . The method of claim 1 , wherein the one or more operational parameters comprise a temperature parameter and a voltage modulation parameter.

8 . The method of claim 2 , wherein the second modulated output is produced by the variable frequency drive until the at least one or the one or more operational parameters is below the threshold.

9 . The method of claim 8 , further comprising:
operating the variable frequency drive to produce the first modulated output in response to the at least one of the one or more operational parameters being below the threshold.

10 . The method of claim 2 , further comprising:
monitoring the operational data associated with the variable frequency drive to determine a rate of change to the one or more operational parameters; operating the variable frequency drive to produce the second modulated output for a second time period, wherein the second period of time is based at least in part on the rate of change to the one or more operational parameters; and operating the variable frequency drive to produce the first modulated output in response to an expiration of the second time period.

11 . A system comprising:
a variable frequency drive; a sensor configured to collect operational data associated with the variable frequency drive; and a controller configured to: receive, from the sensor, operational data, the operational data comprising one or more operational parameters for the variable frequency drive; compare the one or more operational parameters to a threshold; and operate the variable frequency drive to produce a first modulated output based at least in part on the one or more operational parameters being below the threshold.

12 . The system of claim 11 , wherein the controller is further configured to:
operate the variable frequency drive to produce a second modulated output based at least in part on at least one of the one or more operational parameters exceeding the threshold.

13 . The system of claim 11 , wherein the first modulated output comprises a space vector pulse width modulation (SVPWM) output.

14 . The system of claim 12 , wherein the second modulated output comprises a discontinuous pulse width modulation (DPWM) output.

15 . The system of claim 12 , wherein the second modulated output is produced by the variable frequency drive for a first time period.

16 . The system of claim 15 , wherein the controller is further configured to:
operate the variable frequency drive to produce the first modulated output in response to an expiration of the first time period.

17 . The system of claim 11 , wherein the one or more operational parameters comprise a temperature parameter and a voltage modulation parameter.

18 . The system of claim 12 , wherein the second modulated output is produced by the variable frequency drive until the at least one of the one or more operational parameters is below the threshold.

19 . The system of claim 18 , wherein the controller is further configured to:
operate the variable frequency drive to produce the first modulated output in response to the at least one of the one or more operational parameters being below the threshold.

20 . The system of claim 12 , wherein the controller is further configured to:
monitor the operational data associated with the variable frequency drive to determine a rate of change to the one or more operational parameters; operate the variable frequency drive to produce the second modulated output for a second time period, wherein the second period of time is based at least in part on the rate of change to the one or more operational parameters; and operate the variable frequency drive to produce the first modulated output in response to an expiration of the second time period.

Assignees

• Carrier Corp

Inventors

• Agirman Ismail
• Remmers Timothy M

Classifications

• Y02B30/70

  Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating · CPC title

• H02P27/08

  with pulse width modulation · CPC title

• H02P29/68 Primary

  based on the temperature of a drive component or a semiconductor component · CPC title