Invention Grant
- Patent Title: Elevating machine control apparatus
- Patent Title (中): 升降机控制装置
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Application No.: US11911266Application Date: 2006-03-13
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Publication No.: US07882937B2Publication Date: 2011-02-08
- Inventor: Takao Okada
- Applicant: Takao Okada
- Applicant Address: JP Shiga
- Assignee: Fujitec Co., Ltd.
- Current Assignee: Fujitec Co., Ltd.
- Current Assignee Address: JP Shiga
- Agency: Westerman, Hattori, Daniels & Adrian, LLP
- Priority: JP2005-113814 20050411
- International Application: PCT/JP2006/305333 WO 20060313
- International Announcement: WO2006/109415 WO 20061019
- Main IPC: B66B1/28
- IPC: B66B1/28

Abstract:
An elevating machine control apparatus controls an inverter (4) to drive an AC motor (5) connected to the inverter (4) with AC power, and energizes a power generation braking resistor (13) to apply a brake during regenerative operation of the AC motor (5). The apparatus prohibits the elevating machine from starting operating and interrupts power supply to the power generation braking resistor (13) if the DC stage voltage of the inverter (4) has a ripple quantity of a set value or more when the elevating machine is being stopped. Alternatively, the apparatus commands the elevating machine to stop operating and interrupts power supply to the power generation braking resistor (13) if the DC stage voltage of the inverter (4) during regenerative operation is a reference value or less when the elevating machine is in operation.
Public/Granted literature
- US20090058333A1 ELEVATING MACHINE CONTROL APPARATUS Public/Granted day:2009-03-05
Information query
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