An ordinary AC motor with a spring set brake works like that. When no power is applied, a spring presses brake pads against the brake rotor which is attached to the motor shaft. When power is applied, a solenoid overcomes the force of the spring and pulls the brake pads away from the brake rotor so that the motor shaft is free to turn.
2007-11-06 04:36:18
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answer #1
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answered by EE68PE 6
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An electric servo motor with an integrated electric brake will behave like that. When the motor is disengaged, the brake will hold the motor in its last position, and the brake must be disengaged to move the motor.
2007-11-06 04:20:30
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answer #2
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answered by Anonymous
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I think the motor you are referring to is called a 'servo' motor.
A servo drive amplifier is used to 'hold' the motor in position,
these are commonly used in robotics to keep a known position.
Once the power is removed, the motor spins freely.
The drive amplifier provides a voltage/current to move the
motor in increments or at a certain speed. Sometimes a
encoder is mechanically linked to the motor to track it's
position and/or speed.
2007-11-06 13:52:54
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answer #3
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answered by lifestudent 3
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Sounds like a motor with a very strong cobalt permanent magnet stator.
2007-11-06 04:12:55
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answer #4
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answered by Anonymous
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Geared motors are like that.
Direct drive motors with ultra strong pole magnets have very high starting torques.
.
2007-11-06 04:17:06
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answer #5
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answered by tlbs101 7
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motors that are used in overhead cranes, some have conical rotors and stators with clutches on the end side.
2007-11-06 12:46:52
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answer #6
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answered by jesem47 3
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motor bike
2007-11-06 04:38:57
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answer #7
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answered by Anonymous
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I don't know anything about cars but i think that you should go to a mecanician with the car.
2007-11-06 04:13:44
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answer #8
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answered by Anonymous
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