发明授权
- 专利标题: Ride-through method and system for HVACandR chillers
- 专利标题(中): HVACandR冷水机组的通过方法和系统
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申请号: US11218757申请日: 2005-09-02
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公开(公告)号: US07081734B1公开(公告)日: 2006-07-25
- 发明人: Ivan Jadric , Harold Robert Schnetzka
- 申请人: Ivan Jadric , Harold Robert Schnetzka
- 申请人地址: US PA York
- 专利权人: York International Corporation
- 当前专利权人: York International Corporation
- 当前专利权人地址: US PA York
- 代理机构: McNees Wallace & Nurick LLC
- 主分类号: H02P27/04
- IPC分类号: H02P27/04
摘要:
A method of providing ride-through capability in a chiller/refrigeration system employs a variable speed drive with an active converter stage, a DC link stage and an inverter stage for providing variable frequency and voltage to power at least one motor. An induction motor is coupled to the output of the inverter stage for driving a compressor in the chiller/refrigeration system. The ride-through method comprises operating the active converter to regulate the DC link voltage of the DC link stage to a predetermined voltage level until the current through the active converter equals a predetermined current limit, then transferring regulation of the DC link to the inverter upon reaching the current limit of the converter. The compressor is unloaded, and the power flow through the inverter is reversed to maintain the voltage level of the DC link stage.
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