BD3 is a new, advanced brake power supply that offers faster eddy current brake control and higher current capability than BD1.
BD2 offers high current capacity and high voltage supply with low cost and passive cooling.
| BD1 | BD2 | BD3-22.5A | BD3-30A | BD3-45A | |
|---|---|---|---|---|---|
| Continuous current specification |
17.5A @ 40°C ambient |
30A @ 40°C ambient |
22.5A @ 40°C ambient |
30A @ 40°C ambient |
45A @ 25°C ambient |
| Dimensions | 18cm x 13cm x 9.5cm | 14cm x 12cm x 12cm | 14cm x 15.5cm x 12cm | 26cm x 23.5cm x 11cm | |
| Mass | 0.6kg | 1.1kg | 1.3kg | 3.3kg | |
| Cooling type | Fan | Passive | Fan and radiator outside of electronics compartment No worry about dirt ingress |
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| Power supply configurations | 1-phase 120V 1-phase 230V 3-phase 120V (208V) |
1-phase 120V or 230V 3-phase+neutral 120V(208V) or 230V(400V) |
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| Brake charge time Frenelsa F16-160 0A ⇒ 15A |
1-phase 230V 400ms |
3-phase 230V(400V) 70ms |
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| Brake discharge time Frenelsa F16-160 15A ⇒ 5A |
100ms | 4ms | |||
| Brake discharge time Frenelsa F16-160 15A ⇒ 0A |
1500ms | 12ms | |||
| Brake charge time Frenelsa F16-GR 0A ⇒ 22A |
– | 3-phase 230V(400V) 180ms |
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| Brake discharge time Frenelsa F16-GR 22A ⇒ 5A |
– | 6.5ms | |||
| Brake discharge time Frenelsa F16-GR 22A ⇒ 0A |
– | 20ms | |||
| Control | Pulse Width Modulated input controls brake Pulse Width directly | Brake current is controlled internally in closed loop by a fast microcontroller PWM input or CAN-bus sets brake current target |
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| Diagnostics | – | CAN-bus: brake current and controller temperature feedback Additional information possible in future with firmware updates |
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Which power supply should I get?
Recommendation based on dynamometer types:
- Engine dynamometer, hub dynamometer, low inertia dynamometer: BD3
- Roller chassis dynamometer with typical inertia: BD1/BD2 is sufficient, but BD3 will get you better control
I want most economical solution.
Take BD1/BD2. It will work with all dynamometers, however on low inertia dynos, speed control won’t be as fast and precise as with BD3.
I want the best solution.
Take BD3, it will provide you with probably the fastest torque response on the market. You can compare charge and discharge (or magnetization and demagnetization) times with competition products.
My brake needs 22A current. Should I get 22.5A or 45A BD3 version to be safe?
You should get BD3 22.5A version. It could deliver continuous 22.5A in 40°C ambient temperature for unlimited time. 45A version is bigger, heavier, and it will cost you more.