公开(公告)号：US11699972B2

公开(公告)日：2023-07-11

申请号：US16549181

申请日：2019-08-23

Applicant: Johnson Controls Technology Company

Inventor： Samuel A. Hanchett

IPC: H02P3/00 ,  H02P29/64 ,  H02P29/62 ,  G06F13/40 ,  G06F1/3206 ,  H02P29/68

CPC classification number: H02P29/64 ,  G06F1/3206 ,  G06F13/4077 ,  H02P29/62 ,  H02P29/68 ,  H02P2201/09

Abstract: The present disclosure includes techniques for implementing a variable speed drive (VSD) in an environmental conditioning system to facilitate mitigating or eliminating system faults. The variable speed drive drives a motor during on-cycles and heats motor windings of the motor during off-cycles. The variable speed motor drive includes a rectifier that converts alternative-current (AC) power input to a direct-current (DC) power output, a DC bus that is coupled to the rectifier and includes a DC bus transistor, and an inverter. The DC bus transistor pre-charges a DC capacitor of the DC bus to drive the motor during on-cycles and receives a gate pulse with a duty cycle based on a differential temperature, where the gate pulse heats the motor windings. The inverter receives the gate pulse applied to the DC bus transistor and transmits it a motor winding to prevent moisture on the motor winding.

公开(公告)号：US20200067447A1

公开(公告)日：2020-02-27

申请号：US16549181

申请日：2019-08-23

Applicant: Johnson Controls Technology Company

Inventor： Samuel A. Hanchett

IPC: H02P29/64 ,  H02P29/62 ,  H02P29/68 ,  G06F13/40 ,  G06F1/3206

Abstract: The present disclosure includes techniques for implementing a variable speed drive (VSD) in an environmental conditioning system to facilitate mitigating or eliminating system faults. The variable speed drive drives a motor during on-cycles and heats motor windings of the motor during off-cycles. The variable speed motor drive includes a rectifier that converts alternative-current (AC) power input to a direct-current (DC) power output, a DC bus that is coupled to the rectifier and includes a DC bus transistor, and an inverter. The DC bus transistor pre-charges a DC capacitor of the DC bus to drive the motor during on-cycles and receives a gate pulse with a duty cycle based on a differential temperature, where the gate pulse heats the motor windings. The inverter receives the gate pulse applied to the DC bus transistor and transmits it a motor winding to prevent moisture on the motor winding.