![]() If your motor has such a rotor, reducing the voltage is the best way to control it. This is the so called squirrel-cage rotor. That's what's done in motors designed for that kind of control, the ones usually used for fans, vacuum cleaners and so on. ![]() Now voltage reduction will reduce the speed of the drive much more. If you placed a resistor in row with the rotor windings of the motor, you made it's characteristic tilt left. That's a great way to control the speed of the drive, but to avoid magnetic saturation of the iron parts, it had to be accompanied by a proportional voltage reduction for a given motor. If you reduced the frequency, the motor characteristic shrinks along the speed axis. You will find them perfectly applied in refrigerator, industrial fans, and many other low-consumption fields. Annually about 200 thousand sets of PLD 84 series motors are produced in Lepuda. It never reaches the part of its characteristic right of the hill. PLD84 120W Shaded Pole AC Motor Our PLD 84 series shaded pole motors are found to be popular in many countries like Russia, Indonesia, Italy and so on. If you reduced the voltage too much, the motor hadn't got enough torque to drive the fan. Again, the speed of the whole drive would reduce only a tiny bit. If you reduced the voltage, the motor characteristic shrinks along the torque axis. They are widely applied to radiators, evaporators and other refrigeration equipments. I give this example to show you how speed control works. YZ Series motors are shaded pole motors with single-phase and four pole, running at the rated voltage /frequencyof 220-240V, 50/60Hz. If you placed an obstacle in the air channel of the fan, you made its characteristic steeper, so the speed of the whole drive would reduce about a tiny bit. These are (roughly) the hilly torque/speed characteristic of an asynchronous machine (as a shaded pole motor is) and a pump/fan. We implement strict quality control on every shaded-pole motors product to ensure durability and sustainability for a long time. You can guarantee that Longbank can support small and large shaded-pole motors orders to support customer’s business. ![]() Changing the speed means moving the operating point. As a professional manufacturer, we are proud to represent our shaded-pole motor nationwide. It doesn't work on other types of AC motors, but because of some of the inherent design aspects of what make a SP motor work in the first place, the torque / speed relationship is more or less linear, or can be made to appear so. The shaded-pole motor has been produced at Heidrive for around 70 years. Insolroll Motorized Shade Controls With our Open Architecture advantage in our motorized shade control program, Insolroll has the flexibility to work with all platforms to create and customize the control scenario that meets your needs at every motorization level. Voltage-only control of a Shaded Pole (SP) motor is an acceptable method and is the most common. Powerful and reliable shaded-pole motors from Heidrive. You first have to understand the speed of any drive is the result of the torque of the motor and the countertorque of the mechanism you want to drive. Add warmth and sophistication to your home with cordless faux or wood window treatments. Electronic speed controls, various Motor brakes, gears and fan blades make our shaded-pole motors even more flexible and universally applicable.
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