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Kasai makes a series of
Dynacoil hub dynamos for rim and disc brakes with both quick-release and through-axle models. In 2020 they introduced the FS line of field serviceable hubs that can be repaired or serviced. Unlike most hub dynamos that require unlacing the wheel and sending the hub back to the
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road lights. The efficiency of the SON is quoted by the manufacturers at 65% (so just over 5 W of the rider's output is diverted to produce 3 W of electrical power) but this applies at only 15 km/h (9 mph). At higher speeds the efficiency falls. Bicycle dynamos instead use permanent
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SP Dynamo
Systems offers about 10 different models of hub dynamos. Quick release hubs for disc brakes and rim brakes. Also a 15mm thru-axle for mountain bikes with disc brakes. They claim a very high efficiency and light weight compared to other hub dynamos currently on the market.
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and bottom-bracket generators, but the
Dynohub was heavy with its steel housing and was discontinued in the 1980s. Around 2009, Sturmey-Archer released new hub dynamo/drum brake units with an aluminum housing, designated X-FDD and XL-FDD.
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Improvements in design and materials have led to improvements in efficiency. Early designs had multiple copper windings and heavier magnets. Modern designs utilize stronger neodymium magnets, a single copper coil winding, and claw poles.
131:(SON) can power two 6-volt lamps in series at speeds above about 19 km/h (12 mph), and Schmidt manufactures lamps designed to facilitate this. These lamps have optics based on the
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factory to repair the dynamo or replace bearings, the FS hubs are serviceable by the user or a local bike shop. Kasai claims 72% efficiency for the hub at 16 km/h(10 mph).
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offered the DH-CT-630 hub dynamo series with integrated overvoltage protection. It was apparently discontinued in 2010, as it is absent from 2011 and later SR Suntour catalogs.
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hub dynamo until 2017. The D7 series was available for both rim and disc brakes while the D3 series featured several rim brake varieties. In a 2006 review by the German
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reviewed seven different hub dynamos in 2005. The SON28 was found to be the most efficient, although its cost was significantly higher than models from
Shimano.
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offers a variety of hub dynamos under the "Nexus" brand, such as the DH-3N70/DH-3N71, advertised as having significantly less drag than the Nexus NX-30.
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156:, the efficiency at 15 km/h (9 mph) of a D1 series i-Light hub dynamo was 66%, 10% better than a SON-28.
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magnets to eliminate the need for a battery to excite the field and initiate electrical generation.
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Vintage
Bicycle Quarterly Vol. 3, No. 4 (2005) – "Testing the Efficiency of Generator Hubs"
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394:"Kasai Dynacoil FS dynamo hub builds a generator wheel that's roadside serviceable"
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of the 1930s–1970s. This competed effectively with contemporaneous
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306:"SRSUNTOUR 2K7 catalogue by srsuntour europe GmbH - Issuu"
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Testing by Chris Juden at
Wilfried Schmidt Maschinenbau.
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330:"SRSUNTOUR 2K11 catalogue by Hoshi Yoshida - Issuu"
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95:. Most modern hub dynamos are regulated to 3
271:"Has SRAM discontinued i-light hub dynamo?"
79:. Often the hub "dynamo" is not actually a
376:"SP Dynamo System by Borjou Lin - Issuu"
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16:Electrical generator in a bicycle wheel
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111:The market was largely pioneered by
75:wheel that is usually used to power
294:Stiftung Warentest 03/2006 (German)
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449:Info on the Shimano Nexus system.
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354:"sp dynamo hub and dynamo light"
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25:Schmidts Original Nabendynamo
129:Schmidt Original Nabendynamo
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392:Benson, Cory (2020-05-27).
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432:Sturmey-Archer hub dynamo
246:"Sturmey-Archer | XL-FDD"
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220:"Sturmey-Archer | X-FDD"
275:Bicycles Stack Exchange
439:- Generators Compared.
250:www.sturmey-archer.com
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473:Electrical generators
67:built into the front
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65:electrical generator
154:Stiftung Warentest
87:, but a low-power
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31:) brand hub dynamo
358:www.sp-dynamo.com
182:Bicycle Quarterly
148:manufactured the
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463:Bicycle lighting
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364:on 2011-06-20.
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224:Sturmey-Archer
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121:bottle dynamos
113:Sturmey-Archer
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401:. Retrieved
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362:the original
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115:with their
63:is a small
457:Categories
403:2021-11-12
339:2021-11-13
315:2021-11-13
280:2021-11-12
256:2017-01-31
230:31 January
206:References
174:Efficiency
160:SR Suntour
61:hub dynamo
55:dynamo hub
398:Bikerumor
334:issuu.com
310:issuu.com
437:Audax UK
189:See also
39:Another
150:i-Light
140:Shimano
133:Bisy FL
117:Dynohub
89:magneto
73:bicycle
53:Shimano
252:. 2017
226:. 2017
200:Dynamo
107:Models
81:dynamo
77:lights
43:dynamo
101:volts
99:at 6
97:watts
71:of a
232:2017
146:SRAM
127:The
69:hub
41:SON
29:SON
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384:^
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93:AC
85:DC
59:A
51:A
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27:(
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