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*[http://en.wikipedia.org/wiki/Electric_motor Electric motor From Wikipedia, the free encyclopedia] | *[http://en.wikipedia.org/wiki/Electric_motor Electric motor From Wikipedia, the free encyclopedia] | ||
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== Motor Types == | == Motor Types == | ||
=== Brushed Motors === | === Brushed Motors === | ||
Typically a DC motor. Brushes transfer electrical energy to rotating parts and in conjunction with a commutator switch the direction of the current and magnetic field to support the motor's rotation. | Typically a DC motor. Brushes transfer electrical energy to rotating parts and in conjunction with a commutator switch the direction of the current and magnetic field to support the motor's rotation. | ||
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=== Brushless Motors === | === Brushless Motors === | ||
− | These are motors that are in many respects similar to stepper motors, but are typically used for applications of high power/weight situations ( model aircraft | + | These are motors that are in many respects similar to stepper motors, but are typically used for applications of high power/weight situations ( model aircraft ) or high efficiency ( disk drives ). They typically run on DC through a brushless motor controller. |
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A stepper motor is an electric motor that turns a well define amount ( say 6 degrees ), a step, when connected to the right power source. Repeated activation will cause the motor to move any number of steps in either direction desired. Used for carefully controlled motion. Microcontrollers are often used as part of the drive system for a stepper motor. A stepper motor is basically an AC ( or pulsed DC ) motor and requires a motor driver of some sort. | A stepper motor is an electric motor that turns a well define amount ( say 6 degrees ), a step, when connected to the right power source. Repeated activation will cause the motor to move any number of steps in either direction desired. Used for carefully controlled motion. Microcontrollers are often used as part of the drive system for a stepper motor. A stepper motor is basically an AC ( or pulsed DC ) motor and requires a motor driver of some sort. | ||
− | Uses | + | Uses |
*Printers | *Printers | ||
*Machine tools | *Machine tools | ||
*Robots | *Robots | ||
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*[http://en.wikipedia.org/wiki/stepper_motor Wikipedia: "stepper motor"] | *[http://en.wikipedia.org/wiki/stepper_motor Wikipedia: "stepper motor"] | ||
*[http://www.arduino.cc/en/Tutorial/StepperUnipolar Arduino: "Unipolar Stepper Motor"] | *[http://www.arduino.cc/en/Tutorial/StepperUnipolar Arduino: "Unipolar Stepper Motor"] | ||
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*[http://electojects.com/motors/stepper-motors-1.htm Stepper Motors] | *[http://electojects.com/motors/stepper-motors-1.htm Stepper Motors] | ||
*[http://www.romanblack.com/stepper.htm www.RomanBlack.com Measuring Stepper Motors] Basics of stepper motor torque and how to measure it. | *[http://www.romanblack.com/stepper.htm www.RomanBlack.com Measuring Stepper Motors] Basics of stepper motor torque and how to measure it. | ||
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=== Servo Motors === | === Servo Motors === | ||
− | A nice simple way to control the position of an object is to use a servo motor. A servo motor can be any kind of motor that is equipped with a position sensor and a feedback network to control the position.. The information from that sensor is then used to control the motor. In common "RC" servos the sensor is a potentiometer and all the drive electronics are packaged inside the case with the motor. The typical RC servo is powered on 5 volts and takes a PWM signal to control its rotation. Rotation is usually limited to about 90 degrees, and the force at the end of the servo arm ( or horn ) is a few oz. or pounds ( really you should rate it by torque ). Rotation position can be quite accurately controlled, and typically the motor will move in sub second times Sometimes these motors are modified to allow continuous rotation, but then the "servo" is gone from the motor and they do not have their nice ability to set a position. RC Servo motor | + | A nice simple way to control the position of an object is to use a servo motor. A servo motor can be any kind of motor that is equipped with a position sensor and a feedback network to control the position.. The information from that sensor is then used to control the motor. In common "RC" servos the sensor is a potentiometer and all the drive electronics are packaged inside the case with the motor. The typical RC servo is powered on 5 volts and takes a PWM signal to control its rotation. Rotation is usually limited to about 90 degrees, and the force at the end of the servo arm ( or horn ) is a few oz. or pounds ( really you should rate it by torque ). Rotation position can be quite accurately controlled, and typically the motor will move in sub second times Sometimes these motors are modified to allow continuous rotation, but then the "servo" is gone from the motor and they do not have their nice ability to set a position. RC Servo motor pricing begins at about $10. |
− | + | We could use a lot more links here: | |
− | + | See the [[motor driver]] page for more information on the Open Servo project. | |
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=== Universial Motors === | === Universial Motors === |