在 2007年7月13日星期五 UTC+8下午3:39:41，Terry写道：
I purchased a couple of these new windshield wiper motors from ebay.
They are not the common Saturn type of motor, but similar. They have
only 2 wires, and the negative is isolated from the housing (unlike
the Saturn motors). I did not like the Saturn motors because of the
chassis gnd. If used as a servo, the chassis would be hot in one
direction.
I took some torque and current measurements using a Fluke 337 clamp
meter and a 50lbs fishing scale. I made a simple jig to mount the
motor solid to the bench, then attached a 12" steel tube arm to the
shaft. I then attached my fishing scale exactly 12" away from the
center of the shaft and mounted it solid to the bench.
I used a 12V 7.5ah sla battery fully charged to 12.6V. This battery
can source 72A for < 10s, so there was plenty of current for my quick
tests.
Results:
Stall Current: 45A (voltage drop to around 10V)
Stall Torque: 23 ft. lbs.
No load Current: 2A (motor running)
In Rush Current: 8.3A (no load)
All results were very similar in both directions.
Unfortunately, the motors have no markings on them, but they look just
like most of the motors that are sold at surplus stores for around
$20.00. They have 3 - 6mm mounting bolts and run at around 60rpm no
load.
I plan on using these motors for my RC land speed car project. One
for the steering, and one for the hydraulic brake. After measuring
them it looks like they may be a bit overkill, but it can't hurt.
I'll just need to make sure I set up my servo drivers properly (end
limits) and have some good mechanical stops to avoid breaking
anything!
Terry
Sell:
China Shenzhen ZHAOWEI Machinery & Electronics Co. Ltd engages in designing, manufacturing and marketing all kinds of electric motors. They are mainly suitable for the following applications: smart home application used in smart kitchen and laundry,
medical instrument for personal care, smart E-transmission applied in automobile, industry automation applied in telecommunication and a great variety of plastic/metal planetary gearbox in different sizes.
In order to develop the oversea market, we are current seeking new partners around the world to create a bright future together. ZhaoWei is a right choice and excellent partnership with sincere services.
Company: Shenzhen ZHAOWEI Machinery & Electronics Co., Ltd
URL:
http://www.zwgearbox.com/
Contact: Anny Liu
Tel：+86-755-27322652
Fax：+86-755-27323949
E-mail:
sales@zwgearbox.com
Add: Blk. 18, Longwangmiao Industry Park, Fuyong Tn., Bao’an Dist., Shenzhen 518103, Guangdong, China
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