초록 ▼

A method for the control of a load, such as a motor, by means of a start-up controller (1) connected, on the one hand, to a fixed frequency alternating supply, and, on the other hand, to the motor, and including static switches associated with at least one phase of the motor and operated by a contro

A method for the control of a load, such as a motor, by means of a start-up controller (1) connected, on the one hand, to a fixed frequency alternating supply, and, on the other hand, to the motor, and including static switches associated with at least one phase of the motor and operated by a control circuit (2), characterized in that the electromagnetic torque (C.sub.m) of the motor is automatically controlled to a variable reference value (C.sub.cons) in the start-up or deceleration stage of the motor.

대표청구항 ▼

[ We claim:] [1.] A start-up controller for controlling a load having an electromagnetic stator, said controller comprising:a) a fixed frequency alternating electrical supply having an output connected to said load through a plurality of static switches;b) control means for outputting at least one t

[ We claim:] [1.] A start-up controller for controlling a load having an electromagnetic stator, said controller comprising:a) a fixed frequency alternating electrical supply having an output connected to said load through a plurality of static switches;b) control means for outputting at least one trigger signal to said static switches;c) feedback control means for controlling an electromagnetic torque, said feedback control means further comprising:i) means for determining the electromagnetic torque, said determining means further comprising:a device for calculating the electromagnetic torque having an output;phase calculating means having an output;said phase calculating means including means for calculating a time between a predetermined input voltage phase of said electrical supply and said trigger signal;a device for calculating power transmitted to said load by said electrical supply outputting a power value using the output of the phase calculating means;a device for calculating stator losses outputting a power value; said device for calculating electromagnetic torque receiving power values outputted by said device for calculating transmitted power and said device for calculating stator losses;ii) comparator means for determining an error signal between said electromagnetic torque output and a reference value;iii) integrator means for integrating said error signal and outputting a triggering delay value to control the output of said control means.