Using the Lynch Motor for Electric Cars

13 Мар 2014 | Author: | Комментарии к записи Using the Lynch Motor for Electric Cars отключены
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Using the Lynch Motor for Cars

People have asking me about the Lynch . a per-mag motor with an design (pancake shape). motors have a reputation for an outstanding power-to-weight ratio; and the series wound DC motor, are quite compatible with braking . However, almost Lynch motor I’ve has been in a small EV, like a or a scooter.

Until now, is. Today I’m talking to Dr. Pancella, a physics professor at who has twinned two Lynch motors in his Hondatron to get full-sized performance a half-sized motor (50 pounds).

The version? Lighter motor, performance. And regen.

Dr. Pancella on the Motor: A Primer on Per-Mags

I’ve heard of series DC motors and 3-phase AC motors for cars, but haven’t seen as of the permanent magnet motor

Paul: As you know, DC motors can be separated into two types: AC and DC, on how they get their electric My Lynch motor is DC. The basic of an electric motor is that power is used to create fields, which push each other to put the rotor in

Let’s call the part moves the ‘rotor’, and the part stays stationary the ‘stator’. rotor and stator have to magnetic fields for the motor to and at least one of them has to be changeable in with the rotation.

A permanent DC motor (PMDC) has permanent supplying one of these fields, on the rotor. Motors without magnets, such as the series-wound commonly used by converters, use to make both fields, on the and the rotor. The engineering challenge of relatively high current the moving rotor coils is balanced by the cost of permanent

At the scales we are talking about, is sufficiently cheaper than that most motors of size tend to have coils on both elements.

the advent of rare earth (which have more density than iron a series wound motor was not much heavier than a PMDC. Around the time rare earth magnets reliable and reasonably economical, the or axial-flux arrangement was refined, made better use of the fixed of magnetic flux. These combine so that now this of PMDC has much better ratio than the series motors.

The vast majority of electric applications don’t care much about power-to-weight so the cost advantage of series motors persists (as they are in much larger quantities). For purposes, a better P/W ratio can performance, but since we have to around so many pounds of anyway, even here the motors have been to catch on, and so remain much expensive (a very small

Axial-Flux or Pancake Style

Cedric Lynch was an early of a motor of this type big to drive a vehicle, and he founded Electric Motor Co. in Great

At some point, he left and joined/founded Agni motors, markets a motor which is similar to the original Lynch. still makes and sells a of Lynch motors, and that’s who I with. (They’ve since the name to Lees Motor Perm is apparently the name of a company that makes a motor called the PMG. Stratton has the license to sell the motors, also similar, formerly known as the Mars of motors. Cloud Electric has one of the lists of pancake motors in one .

You may notice that all of these tend to be much smaller and powerful than the average used in a passenger car conversion. also top out in rated max voltage at 90 V. They are therefore most in go-karts, boats, motorcycles, and small vehicles. But if you search the site carefully, as I did, you an easy solution with power to push around a car (if you stay away from batteries). You can see this LEM 2×2 here .

Two Lynch Motors, One

The idea of LEM 2×2 is simple. Two motors drive a single and so their power simply They can be wired in parallel or and one controller is sufficient to drive as a single load.

Rinspeed XchangE Electric Cars

To keep the current reasonable, I the series route, so two motors an 80 V limit become one motor to a 160 V battery pack.

The real I ended up with this is that, at the time, this 2×2 was the only PMDC I find with enough to move my car. I wanted a not because of the P/W ratio, but because I wanted to use regenerative braking. It is in principle but very difficult in to use a series wound motor as a when slowing down. On the hand, Kelly controllers had a controller at the time that do regen with a PMDC, and the was still cheaper than others.

My search led to the Lynch, and I the extra cost in order to get I paid about $4000 in a victim of a very unfavorable exchange rate with Britain. Looks like it be a bit cheaper now.


So yes, two pancake-style motors as one unit, constructed to drive a output shaft by the manufacturer. 50 is the total weight of this motor unit. Only one required, when sized

The efficiency peaks at around according to manufacturer specs, not much greater than the EV motor, but a big difference in the ratio of to weight. And in a small car like saving that 75 pounds or so is and means I don’t need as power for the same performance. is especially relevant now in the lithium

Are Lynch Motors Noisy?

I think the sound it makes is about like any other vehicle motor.

I also think there is any difference in noise broadcast by either wound or PMDC motors. In my I can listen to radio stations driving, if they are strong And most modern DC controllers are I think people are getting from the old Curtis boxes.

So for my this Lynch PMDC turned out to be a good choice. I can get 60 hp of peak power, and have no running continuously up to highway in the local terrain. The power is enough to drive my 2300-pound and with LiFePO4 batteries I enough capacity to run 100 miles on a (with regen).

I don’t think this would do as well on a much vehicle, or one that carries a lot of or passengers, but for me it’s been

Rinspeed XchangE Electric Cars
Rinspeed XchangE Electric Cars
Rinspeed XchangE Electric Cars
Rinspeed XchangE Electric Cars
Rinspeed XchangE Electric Cars
Rinspeed XchangE Electric Cars
Rinspeed XchangE Electric Cars
Rinspeed XchangE Electric Cars

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