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Miniature synchronous motor used in analog clocks. The rotor is made of permanent magnet. Small synchronous motor with integral stepdown gear from a microwave oven A synchronous electric motor is an AC electric motor in which, at steady state, the rotation of the shaft is synchronized with the frequency of the supply current; the rotation period is exactly equal to an integer number of AC cycles.
Shading coils (copper bars) within the magnetic circuit of the field coil. The shaded-pole motor is the original type of AC single-phase motor, dating back to at least as early as 1890. [1] A shaded-pole motor is a small motor with either two or four poles, in which the auxiliary winding is composed of a copper ring or bar surrounding a portion ...
Linear motor. Free-body diagram of a U-channel synchronous linear motor. The view is perpendicular to the channel axis. The two coils at centre are mechanically connected, and are energized in "quadrature" (meaning a phase difference of 90° (π/2 radians) between the flux of the magnets and the flux of the coils).
Transmission (mechanical device) A transmission (also called a gearbox) is a mechanical device which uses a gear set —two or more gears working together—to change the speed or direction of rotation in a machine. [1] [2] Many transmissions have multiple gear ratios, but there are also transmissions that use a single fixed-gear ratio.
A linear induction motor ( LIM) is an alternating current (AC), asynchronous linear motor that works by the same general principles as other induction motors but is typically designed to directly produce motion in a straight line. Characteristically, linear induction motors have a finite primary or secondary length, which generates end-effects ...
The universal motor is a type of electric motor that can operate on either AC or DC power and uses an electromagnet as its stator to create its magnetic field. [1] It is a commutated series-wound motor where the stator 's field coils are connected in series with the rotor windings through a commutator. It is often referred to as an AC series motor.
Switched reluctance motor. The switched reluctance motor ( SRM) is an electric motor that runs by reluctance torque and thus is a subgroup in reluctance motors. Unlike common brushed DC motor types, power is delivered to windings in the stator (case) rather than the rotor. This greatly simplifies mechanical design as power does not have to be ...
![馬達 四驅車馬達 馬達140 電壓3V W3.190210 [317495]](https://s.yimg.com/fz/api/res/1.2/etqDzZdFCorC7rdc6tZuHw--~C/YXBwaWQ9c3JjaGRkO2ZpPWZpbGw7aD0xNDY7cT04MDt3PTE0Ng--/https://ct.yimg.com/xd/api/res/1.2/56eBo9UYmpFzQOI4jkh6sw--/YXBwaWQ9eXR3YXVjdGlvbnNlcnZpY2U7aD00MDA7cT04NTtyb3RhdGU9YXV0bzt3PTQwMA--/https://s.yimg.com/ob/image/17475b78-54c5-42c3-b736-456d00dc6193.jpg "馬達 四驅車馬達 馬達140 電壓3V W3.190210 [317495]")
