Converting 110VAC to 220VAC for KitchenAid Mixer (4KSM6573CCU) with Unique DC Motor

Hello everyone, this is my first time posting. I have an electrical background but this is not my expertise, so please bear with me.

I have a KitchenAid Mixer (#4KSM6573CCU) that rated for 110VAC and I'm trying to convert it to work with 220VAC. This model is quite unique because it uses a DC Motor unlike the regular models.

It has one board, the DC motor (120VDC, 2.1A), and a sensor (maybe a hall-effect). The board uses an LNK304PN to convert AC/DC for the MCU circuit which is good for 85-265VAC. From what I can see, they mostly built the PCB right out of the recommended PCB layout from the LNK304PN spec sheet.

For motor controls they use the bridge rectifier G2006-BP for the DC motor (preceded by a Triac T2050H-6T and Relay ORWH-SH-112HM3F) which also looks fine to me. I'll have to look again at the relay because the contacts are rated for 10A at 277VAC, but 15A at 125VAC.

I traced the AC part of the PCB connections as best as I could (attached image), and from what I can see so far, I would need to replace the MOV (S14K175, 175A RMS), and a capacitor (22uF, rated 250V).

No worries if the board burns up in the process, I'm just doing this as a learning experience. Perhaps my next step would be to build something from scratch. I would really appreciate someone's help and advice on how to proceed. Thank you.

Hello
Wouldn't it be easier to use a "reducer" - a voltage converter from 230 to 110V?
E.g. https://www.google.com/search?q=variable+volt...riable+voltage+reducer+230+na+110v&aqs=chrome. .69i57j0i546l4.2996676j0j15&sourceid=chrome&ie=UTF-8

You didn't specify the power of the device, so I can't suggest a suitable model.
Regards.

Sure. It will work with a transformer, even though the frequency is different, the motor is a DC motor, so it will not break down in the long run. But I don't want a bulky transformer in the kitchen, and I'd like to explore converting the circuit. The motor side of the circuit might be fine if I change the MOV and Capacitor. It has a hall effect sensor for speed feedback, so if it's quicker due to the 220v, I'm hoping it will compensate the gate signal. That leaves the MCU circuit, and I'm thinking that I'll tackle that by using Power Integrations' (Manufacturer of the LNK304PN) simulation tool, so I'll try to play around with some component values until I get an acceptable ripple for the MCU circuit. The LNK steps it down to 12VDC, and I think somewhere else it gets further stepped down to the MCU needed 5V supply. I'll need to further trace the PCB connections. I haven't gotten around to that part yet.

Hello Abenlamhidi,

I also have the same KitchenAid and have been looking for a 110/240 volt conversion kit which doesn't seem to exist.

Thank you in advance for your reply.
Eithel

Hello Eithel,

I hit a dead end. I contacted Power Integrations for info but they said they don't offer the simulation profile for that particular chip, only the newer version of it. Over a year later, the mixer is still sitting in pieces.

Good luck with that.
For my part, I use a small voltage converter (500w) which I installed in a cupboard where I cut a hole to pass the cable from a power strip.
Good luck, Eithel.