Torque shudder protection device and method

Patent · Tue Mar 11 04:00:00 EST 1997

OSTI ID:445699

King, R D; Szczesny, P M

A torque shudder protection device for an induction machine includes a flux command generator for supplying a steady state flux command and a torque shudder detector for supplying a status including a negative status to indicate a lack of torque shudder and a positive status to indicate a presence of torque shudder. A flux adapter uses the steady state flux command and the status to supply a present flux command identical to the steady state flux command for a negative status and different from the steady state flux command for a positive status. A limiter can receive the present flux command, prevent the present flux command from exceeding a predetermined maximum flux command magnitude, and supply the present flux command to a field oriented controller. After determining a critical electrical excitation frequency at which a torque shudder occurs for the induction machine, a flux adjuster can monitor the electrical excitation frequency of the induction machine and adjust a flux command to prevent the monitored electrical excitation frequency from reaching the critical electrical excitation frequency. 5 figs.

• Research Organization: Ford Motor Co
• DOE Contract Number: AC07-90ID13019
• Assignee: General Electric Co., Schenectady, NY (United States)
• Patent Number(s): US 5,610,490/A/
• Application Number: PAN: 8-548,064
• OSTI ID: 445699
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
CONTROL EQUIPMENT
DESIGN
EQUIPMENT PROTECTION DEVICES
INDUCTION GENERATORS
LIMITING VALUES
OPERATION
TORQUE