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Build Your Online Product Catalogs?
| Product Name: |
Variable frequency drive manufacturers
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| Supply Ability: |
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| Related proudcts |
ac drive, vfd, |
| Specifications |
Gozuk VFD drives |
| Price Term: |
FOB |
| Port of loading: |
China |
| Minimum Order |
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| Unit Price: |
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A variable frequency drive can replace a standard motor starter. You will still need motor overload protection but the variable frequency drive may have the capability to provide the required overload protection.
For sure if it needs to be reversing. But the way they are going for small loads like that now is ECMs (Electrically Commutated Motors) where they are essentially PMDC motors with the electronics built-in to the motor itself. They are now cheap enough to be seen on appliances like washers and dryers, the volume is already so high it's only a matter of time before we see them displacing FHP industrial motor applications. You'll have a 1 phase CB or fuse set feeding a motor, the motor control and protection will all be integral to the motor.
An important difference between brush and brushless DC motors is the current carrying coils move from the rotor to the stator thus providing much better heat transfer. So there should be more available power output from a brushless for a given package size and cooling method. Otherwise the theory and characteristics are quite similar.
If you are trying to correct the low power factor the line side of the drive is showing to your system, yes I have also seen drives with caps on the line side. In the cases I have been involved with, the caps were selected to control the harmonics, raise the pf, and not cause too much disturbance when they were switched on with no load on the variable frequency drive.
If you are thinking putting caps on the motor side will fix the low pf on the line side - no that won't work. The DC bus between the line side and the load side stops that. You can't reflect vars across the DC bus. The output inverter has to handle whatever pf the motor (including installed caps) puts up.
I have seen a drive that automatically adjusts the output voltage to minimize the vars the motor draws, That one also had caps on the drive output. |
| Company: |
VFD Manufacturer
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| Contact: |
Mr. Fank Fang |
| Address: |
Building 2 Xuwu Gongle Xixiang, Bao'an District Shenzhen |
| Postcode: |
518000 |
| Tel: |
8675528480241 |
| Fax: |
008675528480233 |
| E-mail: |
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