| 摘要 |
<p>A control system for controlling the speed of a passenger conveyor. The passenger conveyor includes a passenger carrying means and an electric motor (5) for driving the passenger carrying means. The electric motor (5) has a rotor and is controlled by the control system. The control system includes a frequency inverter (4) receiving at least one inverter control signal and supplying motor voltages to the electric motor (5). The control system has a rotor sensor (h<SUB>a</SUB>, h<SUB>b</SUB>, h<SUB>c</SUB>) detecting<I/>predetermined rotor angle positions and supplying rotor angle position signals (T<SUB>R,k</SUB>) related to predetermined rotor angle positions. The control system comprises a rotor position observer (7) which receives the rotor angle position signals (T<SUB>R,k</SUB>) and generates estimated rotor angle values (T<SUP>^</SUP>) on the basis of the received rotor angle position signals (T<SUB>R,k</SUB>). The estimated rotor angle values (T<SUP>^</SUP>) occur with a rate which is higher than the rate of occurrence of the received rotor angle position signals (T<SUB>R,k</SUB>). The rotor position observer (7) generates an estimated rotor speed value (?<SUP>^</SUP>) in response to the estimated rotor angle values (T<SUP>^</SUP>). The control system includes a speed profile generator (1) which supplies a<I/>reference angular speed value (?<SUP>^</SUP>) and a reference angular acceleration value (?<SUP>.</SUP>*). The control system has an adaptive speed controller (2) which receives the reference angular speed value (?<SUP>^</SUP>) and the reference angular acceleration value (?<SUP>.</SUP>*) as set values and the estimated rotor speed value (?<SUP>^</SUP>) and the estimated rotor angle values (T<SUP>^</SUP>) as actual values. The adaptive speed controller (2) supplies reference motor current values ( i<SUP>*</SUP></p> |
