Search found 937 matches

by rew
10 Jun 2018, 12:07
Forum: General
Topic: Brushed Brakes
Replies: 2
Views: 70

Re: Brushed Brakes

Yes, regenerative braking should work, also in brushed mode.


As to pairing: That has something to do with YOUR reciever and YOUR transmitter. After that, you connect your PWM out from the receiver to the PWM in of the VESC. Then you can configure the PWM input app.
by rew
30 May 2018, 07:18
Forum: Feature Requests
Topic: Sleep mode
Replies: 10
Views: 2879

Re: Sleep mode

My bike controller wakes up (i.e. complete with 5V backlit LCD) without a battery connected when I move the bike from the stand.... It is vesc based, but indeed it has what you call "buck en" hardwired active. So, to enable such a feature, you'd need a pin from the CPU through a diode to b...
by rew
30 May 2018, 07:09
Forum: Hardware Problems
Topic: Low Voltage on 3.3V and 5V Pin
Replies: 8
Views: 416

Re: Low Voltage on 3.3V and 5V Pin

A wise man once said: If DRV gnd is unsoldered, the 5V will be higher than normal. But there are a few other things that could cause the 5V line to be much higher than expected. You have all the components and are building your VESC yourself AND you're having power supply issues, please do NOT solde...
by rew
30 May 2018, 07:01
Forum: FOC
Topic: AC induction motor
Replies: 10
Views: 1362

Re: AC induction motor

In vesc_tool, on the terminal tab you can type foc_openloop <somecurrent> <someRPM>. So when you have your bog-standard 1440RPM 460W asynchronous motor, you could try feeding your VESC with 30V and typing: foc_openloop 2 300 . The 460W specification means that the max current for this motor is 2A (@...
by rew
30 May 2018, 06:45
Forum: General
Topic: Sensorless tach with brushed motors
Replies: 2
Views: 87

Re: Sensorless tach with brushed motors

Let me get this straight. You have a brushed motor and you want to have SOME feedback on how fast it is going from the motor controller without having to install the hardware that measures this. Right? With most motors and most dutycycles, the current does not return to zero. So during the PWM OFF p...
by rew
30 May 2018, 06:24
Forum: General
Topic: Editing pin configuration?
Replies: 1
Views: 36

Re: Editing pin configuration?

That configuration is mostly in hwconf/hw_<name-of-your-hardware>.h (and .c).
by rew
22 May 2018, 05:24
Forum: Feature Requests
Topic: Sleep mode
Replies: 10
Views: 2879

Re: Sleep mode

I would guess that the push-to-wake function works by rectifying the motor voltage through the mosfets. This happens automatically. So even with the battery disconnected, you will be able to power up the motor controller. Then the motor controller can arrange to enable the battery.
by rew
22 May 2018, 05:17
Forum: Hardware Problems
Topic: 3.3V Problems with VESC hw4.12
Replies: 4
Views: 129

Re: 3.3V Problems with VESC hw4.12

Well... the DRV should be functioning as a switching regulator to make 5V. If that doesn't happen, the DRV is broken, or somehow not correctly connected. Can you measure a short between the 5V and GND? There is a zener that tries to keep 5V at "near 5V" levels when the DRV misbehaves and t...
by rew
22 May 2018, 05:12
Forum: FOC
Topic: AC induction motor
Replies: 10
Views: 1362

Re: AC induction motor

Still one year later, the situation is the same: nobody has written the firmware yet.

I'd say that you could give it a go with "foc openloop" and see how close that comes to running the motor acceptably.
by rew
03 May 2018, 06:35
Forum: General
Topic: Make Upload Error
Replies: 6
Views: 276

Re: Make Upload Error

Flashing the binary into the F411 on the discovery board is an "exercise" to see if you have the software and commands set up correctly. The next step is to remove the jumpers hook up the cable to the target VESC and program the VESC. If that does not work, it would seem your connections a...

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