| 摘要 |
A supply voltage (Va) is applied to one phase of an aircraft seat actuating motor (10) and a current transformer (18) in the motor circuit supplies a parallel resistance/capacitor circuit (26,28) which is only made during positive half cycles by controlled transistor switches (22,24). The capacitor voltage (Vc) is proportional to the active current component and it is measured and multiplied by a constant (36,38) to produce the torque estimate
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