Plettenberg Nova motors and MST controllers: 15, 30, 150kW
- Thread starter ron van sommeren
- Start date
jonescg
100 MW
150 kW might indeed be possible... for about 3 seconds. I want to know what their continuous rating is. A 150 kW peak motor weighing one quarter of an Evo AFM140. It couldn't possibly put out even 75 kW for very long before overheating. Call me sceptical, but I think there's some misleading figures there at best. Looking forward to some real world testing... if anyone can afford the 150 that is 
Giovanni LiCalsi
100 W
Are these motors trapezoidal or sinusoidal?
parabellum
1 MW
I think, he means motors BEMF and consequently better feeding method for this specific motor.madin88 said:Giovanni LiCalsi said:
motors?
I think you mean the controllers
Giovanni LiCalsi
100 W
I want to use a Sevcon Gen4 controller with the Plettenberg Nova 30 motor.
The controller use sinusoidal.
The controller use sinusoidal.
Two Nova 15s (SN000001 and SN000002), with the corresponding MST controllers.
Currently controlling them through serial interface, not liking it, will try analog control coming week. Through serial interface all I can do is "PWM" control no speed or torque control, which baffles me.
Had some weird serial errors/glitches, ie. when rapidly decreasing PWM for some reason controllers will somehow see the "Max" throttle command occasionally and go crazy, or when I tell it to freewheel with "0" and it sends the degree character instead (which is scary when you're trying to suddenly stop the max throttle). Also I cannot send a brake command without the motor being a drive state first. (so cant go from freewheeling into brake).
I have not checked which drive method these use. Primary objective with my testing setup is for regen.
Currently controlling them through serial interface, not liking it, will try analog control coming week. Through serial interface all I can do is "PWM" control no speed or torque control, which baffles me.
Had some weird serial errors/glitches, ie. when rapidly decreasing PWM for some reason controllers will somehow see the "Max" throttle command occasionally and go crazy, or when I tell it to freewheel with "0" and it sends the degree character instead (which is scary when you're trying to suddenly stop the max throttle). Also I cannot send a brake command without the motor being a drive state first. (so cant go from freewheeling into brake).
I have not checked which drive method these use. Primary objective with my testing setup is for regen.
Giovanni LiCalsi
100 W
I spoke with the Sevcon tech and the Gen4 will not work with the trapezoidal waves. They can custom build it for that but trapezoidal wave is not the most efficient.
why you want trapezoidal waves?Giovanni LiCalsi said:
with an FOC sine wave controller you can drive any BLDC motors, less noisy, more efficient, and in comfortable torque mode.
as far as i know with sine wave efficiency will a bit rise due to: less iron hysteresis losses, less copper losses
The controller must be set up with exactly fitting settings to every different motor.
Giovanni LiCalsi said:
like arlo says it should be fine to run the motor either way, i would have thought drama would be more that the sevcons would barely run these motors to a quarter of their max rpm and power ? (ie check the motors pole pairs vs sevcons max commutation frequency).
Giovanni LiCalsi
100 W
How can I see this in English?
liveforphysics
100 TW
Try to get solid control of a single motor first.
Even when controllers just share a battery and otherwise get fully isolated signals, Ive seen wonky throttle behaviors. I think it's gotta be ground loops in the main power bus.
Even when controllers just share a battery and otherwise get fully isolated signals, Ive seen wonky throttle behaviors. I think it's gotta be ground loops in the main power bus.
h0tr0d
1 kW
- Joined
- Apr 28, 2012
- Messages
- 460
Thecmak,
Have you respected the battery cable length referred in the manual?
Also there's a lot of stuff talking about 5V, everything according to the manual also?
Is DC coming from a battery, power supply, both, any caps in parallel... ?
Have you tried to fully disconnect the generator setup and just run the motor?
Have you tried using both controllers to serve as motor controllers? Same errors glitches?
Quality serial cables with decent EMI insulation?
Guys,
240'000 erpm is nice. How many Hz is that?
Have you respected the battery cable length referred in the manual?
Also there's a lot of stuff talking about 5V, everything according to the manual also?
Is DC coming from a battery, power supply, both, any caps in parallel... ?
Have you tried to fully disconnect the generator setup and just run the motor?
Have you tried using both controllers to serve as motor controllers? Same errors glitches?
Quality serial cables with decent EMI insulation?
Guys,
240'000 erpm is nice. How many Hz is that?
Miles said:
You mean the Sevcons?
The manual posted in this thread says the Plettenberg controller does 240000 ERPM, which is 4000Hz. Looks like it's a sensored 6-step trapezoidal controller where you program a motor current limit and set the PWM-duty with the throttle.
