6-FET, WZK-713C controller, Zhongtian

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gman1971   10 kW

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Re: New to the board. Just built my 1st ebike

Post by gman1971 » Apr 13 2016 3:10am

pics?

G.
I am all about high-speed, low-drag, mid-drives and gears...
A-3 trike, ?-kW, ??+ mph (Cyclone powered) Very fast, ludicrous speed fast...
A-1B trike, 6+kW, 65+mph (Cyclone powered): https://www.youtube.com/watch?v=oFC8MRwvgUM
A-2A trike 3kW, 50mph (Cyclone powered): https://www.youtube.com/watch?v=bNoqp0wl6Vo
eB-1C bike 3kW, 42mph (Cyclone powered): https://www.youtube.com/watch?v=_weSmz_h3Ig

Kingfish   10 GW

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Re: Infineon 6FET EB777 25A Review

Post by Kingfish » Apr 13 2016 6:59am

Hi Pancho –

It is an old thread! :)

Could you take a nice clear picture of both sides of the PCB please? I can try to answer some of these:

1. Unsure; picture is worth a 1000 words
2. Correct on my schematic.
3. Unsure, other than monitoring Phase C.
4. EBS = Electric Brake Switch. Typically this is shorted (pulled-low) to GND to create brake (EBS- pad), otherwise it is pulled high to +5V (EBS+).
5. BK pulled low enables Regen.
6. SL pulled low enables Speed Limit, which is a programmable feature.
7. TB = Alarm. I have not used this, although others have. My preference is a chain lock :)
8. Serial Port for sure; TX = Transmit, RX = Receive. MBC = ?; might be “Reset”. Again – a picture would help. The Serial Port is used to program the device. To program, we’d need to know which MCU was used so the handshake protocol could be defined.
9. CR to GND enables Cruise, which is also programmable. Cruise is rather basic and not at all like cars:
  • a. Hold CR to GND to enable.
    b. Duration of Hold is programmable, typically 1 to 7 seconds.
    c. Throttle releases CR.
    d. EBS releases CR.
    e. Shorting CR to GND again may also release CR. It’s kinda hokey, though beats holding onto that dang throttle for hours on a long road trip.
I sympathize with your struggle amigo.
Mañana, KF
* My 2WD Garden Wall
* Kinaye MotorSports
* Primary ride: 2WD Disc 9C 2806-equiv / Dual Lyen 12FET / 20S7P LiPo.
* Epics: Going to California: 2011 8)
* 50-mph, 101, 10k-Club. 12,527 miles-to-date, 7037 as 2WD.

It is by caffeine alone I set my mind in motion.
It is by the beans of Java that thoughts acquire speed.
The hands acquire shakes, the shakes become a warning.
It is by caffeine alone I set my mind in motion.

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lester12483   10 kW

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Re: New to the board. Just built my 1st ebike

Post by lester12483 » Apr 13 2016 7:01am

Learn as you go like most of us here did. Building your own ebike is very rewarding.
MT6 Hybrid- Electric Bicycle 48V
48V 23AH AllCell Lithium Manganese Battery Pack
http://www.chicagoelectricbicycles.com

Kingfish   10 GW

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Re: Infineon 6FET EB777 25A Review

Post by Kingfish » Apr 14 2016 10:49pm

Hi Pancho –
Apologies for the late reply; I was busy last night doing what I do – write code. But now I’m here for you.

Trivia about the PCB:
The FET: http://www.irf.com/part/75V-Single-N-Ch ... A~IRFB3607
  • RDS(on) = 9 mOhms!! 75V limit.
    140W (via Digikey)
I don’t know why they bothered to upgrade the caps for this varietal.

The manufacturing date (2010-08-07 stamped on the component-side) of the PCB places it to nearly 6 years old. That might contribute to part of the operation problem; old age and cheap parts.

Programmability: Although the thread suggests it cannot be programmed, knowing what I know now after writing the Windows BT Interface, it’s just a handshake issue. I am 90% certain this MCU was not fused a 2nd time; it just doesn’t makes sense. That said, there is little else information about this short-lived model; Ebikes moved on to another unit shortly thereafter.

Addressing specific items:
1. In this thread we discussed the very same pads. P22 to GND enables Regen. According to Kiwi on Wed Mar 30, 2011:
Kiwi wrote:P20 and P21 Are the speed settings. Connect P20 to ground for Speed setting one or P21to ground for speed setting 2 or neither for controller default speed.
3. Pancho, on the Grey wire attached to XC, where does the other end go? Curious.
8. With the 116 MCU, RESET attaches to X3. MBC however attaches to a voltage divider, and on the 116 this goes to C3. Alas – I do not have an Infineon Controller schematic, so I am a bit in the blind. I’m thinking MBC is pulled high to reset the MCU; just a gut feeling from looking at the schematic of the 116. None of this is useful though if we do not know the handshake and protocol. Such an old board; I don’t think anyone on ES cracked this one.

Pancho, Does the controller work at all? Can you tell us a little bit about what it is connected to, motor, type of bike?

Generally, this particular Controller is/was compatible to the Standard of the time which is the same as today for common Chinese controllers:
There should be stub-outs for Throttle, 3-Way Current Control, Cruise, Regen Brake (might be that is a mod on the PCB directly).

With kind regards, KF
* My 2WD Garden Wall
* Kinaye MotorSports
* Primary ride: 2WD Disc 9C 2806-equiv / Dual Lyen 12FET / 20S7P LiPo.
* Epics: Going to California: 2011 8)
* 50-mph, 101, 10k-Club. 12,527 miles-to-date, 7037 as 2WD.

It is by caffeine alone I set my mind in motion.
It is by the beans of Java that thoughts acquire speed.
The hands acquire shakes, the shakes become a warning.
It is by caffeine alone I set my mind in motion.

Kingfish   10 GW

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Posts: 4064
Joined: Feb 03 2010 11:23am
Location: Redmond, WA-USA, Earth, Sol, Orion–Cygnus Arm, Milky Way. Age: > yesterday < tomorrow
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Re: 6-FET, WZK-713C controller, Zhongtian

Post by Kingfish » Apr 15 2016 10:33pm

Hi Pancho –

Oye, ¿cómo va?

Thanks for the Schematics amigo!
Searching Google on "xc866 controller MBC", I found an Infinion Spec Sheet: "8-Bit SAA-XC866".
MBC means "Monitor & BootStrap Loader Control" and is on Pin-1. The MCU Reset is on Pin-38.

Confirmed on my schematic that XC does connect to Phase-C, although it is not connected. Instead we use an ebike computer called a Cycle- Analyst, and it monitors Halls-C to get speed; just divide by the number of poles in the motor and you have RPS. Much safer than Phase-C :)
I am excited for you. Electric mobility is way cool.

Have you considered upgrading batteries to LiPo? They would weigh less than SLA Panasonic, and are more compact. Just a thought.
Salud! KF
* My 2WD Garden Wall
* Kinaye MotorSports
* Primary ride: 2WD Disc 9C 2806-equiv / Dual Lyen 12FET / 20S7P LiPo.
* Epics: Going to California: 2011 8)
* 50-mph, 101, 10k-Club. 12,527 miles-to-date, 7037 as 2WD.

It is by caffeine alone I set my mind in motion.
It is by the beans of Java that thoughts acquire speed.
The hands acquire shakes, the shakes become a warning.
It is by caffeine alone I set my mind in motion.

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