Hey there i would like help to design a permanent magnet dc motor Drive.
The drive has the following components:
48V Dc motor
Mosfet H-bridge inverter
Single-Phase Rectifier
Mains Transformer
Dc Link Capacitor
Gate Drive Circuit
Control Electronics (inc. microcontroller)
The motor: Brushed Permanen magnet field on stator.
Armature Voltage: 48V
Rated Speed: 3000rev/min
Rated torque: 0.146 Nm
Rated Curren: 1A
ktψ: 0.146 Nm/A
Ra: 2 Ohm
La: 10mH
The difficulties I have: is 1) I don't know how to choose the correct MOSFETS for the H-bridge . Also it is said that a 48V Dc link would probably be sensible. 2) I don't know how to choose a suitable Dc link capacitor. Because it says that i have to choose it based on the dc link voltage with a safety margin. 3) I am struggling to calculate the maximum electrical power input to the motor when it delivers full rated mechanical input and i have to calculate this in order to choose a suitable bridge rectifier
I really need your help. Please if someone can help me is for a design project i have to do for the university. Thanks
The drive has the following components:
48V Dc motor
Mosfet H-bridge inverter
Single-Phase Rectifier
Mains Transformer
Dc Link Capacitor
Gate Drive Circuit
Control Electronics (inc. microcontroller)
The motor: Brushed Permanen magnet field on stator.
Armature Voltage: 48V
Rated Speed: 3000rev/min
Rated torque: 0.146 Nm
Rated Curren: 1A
ktψ: 0.146 Nm/A
Ra: 2 Ohm
La: 10mH
The difficulties I have: is 1) I don't know how to choose the correct MOSFETS for the H-bridge . Also it is said that a 48V Dc link would probably be sensible. 2) I don't know how to choose a suitable Dc link capacitor. Because it says that i have to choose it based on the dc link voltage with a safety margin. 3) I am struggling to calculate the maximum electrical power input to the motor when it delivers full rated mechanical input and i have to calculate this in order to choose a suitable bridge rectifier
I really need your help. Please if someone can help me is for a design project i have to do for the university. Thanks
Last edited: