2006-10-03 05:19:43 · 6 answers · asked by rachidik2 1 in Science & Mathematics ➔ Engineering
The PM Synchronous motor is a rotating electric machine where the stator is a classic three phase stator like that of an induction motor and the rotor has surface-mounted permanent magnets. In this respect, the PM Synchronous motor is equivalent to an induction motor where the air gap magnetic field is produced by a permanent magnet. The use of a permanent magnet to generate a substantial air gap magnetic flux makes it possible to design highly efficient PM motors.
A PM Synchronous motor is driven by sine wave voltage coupled with the given rotor position. The generated stator flux together with the rotor flux, which is generated by a rotor magnet, defines the torque, and thus speed, of the motor. The sine wave voltage output have to be applied to the 3-phase winding system in a way that angle between the stator flux and the rotor flux is kept close to 90° to get the maximum generated torque. To meet this criterion, the motor requires electronic control for proper operation.
For a common 3-phase PM Synchronous motor, a standard 3-phase power stage is used. The same power stage is used for AC induction and BLDC motors. The power stage utilizes six power transistors with independent switching. The power transistors are switched in the complementary mode. The sine wave output is generated using a PWM technique.
ASynchronous motor :
Model No.: MY
Product Origin: China
See the most recent posting for this Asynchronous Motors (Sep 29, 2006)
Detailed Product Description
Features and specifications:
1) This MY series motor has aluminum housing
2) With latest design, made from selected quality materials
3) Conforms to the IEC standard
4) Good performance, safe and reliable
5) Attractive appearance
6) Easy maintenance
7) Low noise, low vibration, light weight
8) Starting torque multiple: 0.3 - 0.7
9) Suitable for low starting torque requirements and long-term continuous
use (home electric appliances, pumps, fans, recording meters)
2006-10-03 21:33:03 · answer #1 · answered by Anonymous · 0⤊ 0⤋
A sychronous motor rotates in phase with the driving AC signal. An asynchronous motor will run at a frequency slightly slower than the driving AC signal.
2006-10-03 05:51:17 · answer #2 · answered by rscanner 6 · 0⤊ 0⤋
A sychronous motor would run at an exact multiple of the frequency feeding it...a 2 pole induction motor, for example would run exactly 3600 rpm. Even under load, it would maintain this speed upto a point, then the speed falls off, or in other words...it goes "asychronous". Synchronous motors are typically used in timer motors.... asychronous motors are just just your standard motor, without the sychrounous design built in it.
2006-10-03 17:45:09 · answer #3 · answered by jito11rivera 3 · 0⤊ 0⤋
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2016-11-26 00:41:52 · answer #4 · answered by ? 4 · 0⤊ 0⤋
Depends on the timimng of the poles and the rotational speeds.
2006-10-03 05:42:49 · answer #5 · answered by ag_iitkgp 7 · 0⤊ 0⤋
An A it looks like.
2006-10-03 05:26:41 · answer #6 · answered by Phil My Crack In 4 · 0⤊ 0⤋