ZhejiangCuangmei Eectromotor Co. Ltd. locates the coast city of Wenling in Zhejiang province . company is the province of science and technology enterprises ,City hi tech enterprises, mainly produce all kinds of permanent magnet synchronous motor which including frequency conversion drive permanent magnet synchronous and asynchronous start permanent magnet synchronous motor, company obtain China energy saving product certification for permanent magnet synchronous motor
We can design and produce all kinds of frequency conversion drive motor with all different speed and power (from several decade watt to 200 kW), for asynchronous start, motor can be 2,4,6,8 poles. high speed deep well pump with DC brushless permanent magnet synchronous motor is the first product we designed and researched for synchronous motor series. the technology has been patented by the State Intellectual Property Office, awarded by Ringier Trade Media Ltd. with 2014 international valve industry technology innovation award. then we have achieved 13 utility model patents in the application of the permanent magnet synchronous motor in the pump(there are still several inventions and international patents in the declaration),we've made so much of the patent technology before synchronous motor apply to pump industry widely , that is why we are in the leading position of this technology.
We are willing to develop all kinds of cooperation and exchange together with all the people or any Organization Department who is interested in production, sale and use of energy saving and environmental protection, trying our best to make much more blue sky and white clouds!!
Product Description
Rotor of our pmsm permanent-magnetic synchronous motor is made of rare earth magnet. Our motor is driven by a driver whch works when gap between rotor and winding differs. Pump speed is decided by this driver. Rotating magnetic field of rotor and stator keep rotating synchronously. Without Holzer position sensor, our controller is the latest development in DC frequency conversion technology, which is different from other vector inverter. It can work under constant power, constant speed and constant torque with quick reflection and precise control. In the followingpower load curve, we can see a stable output power. Also we can see synchronous motors keep working in high efficiency from the very beginning, which is superior than other asynchronous motors. Efficiency of our pmsm synchronous motor is 15% to 20% higher than that other single-phase asynchronous motor(include loss from motro and controller), and 7% to 10% higher than three-phase asychronous motor. If we equip three-phase asychronous motor with frequency conversion control, its efficiency can be 10% to 13% higher. See attached power load diagram.
