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Veléz Sarsfield 201640 Martinez

Buenos Aires

Tel.: +54 (9) 11 5993 8719

Horne Technologies cc

PO Box 536

Betty's Bay, 7141

Tel.: +27 (0)76 563 2084

Building of FAULHABER MINIMOTOR SA, Croglio, Switzerland


Zona Artigianale 8, Madonna del Piano

6980 Croglio

Tel.: +41 (0)91 611 31 00

Building of FAULHABER MICROMO LLC, Wien, Austria


14881 Evergreen Avenue

Clearwater, FL 33762-3008

Tel.: +1 (727) 572 0131

NRC Engineering & Precision Drives Co., Ltd.

17F., No. 890, Jingguo Rd., Luzhu Dist.

Taoyuan City 33858, Taiwan, R.O.C.

Tel.: +886 (0) 3-316-1838

EDEL Teknoloji Sistemleri Sanayi ve Ticaret Ltd.Şti

Folkart TowersAdalet Mah.Manas Blv. No:47B/2809

35530 Bayraklı/İzmir

Tel.: + 90 232 215 08 91

Building of FAULHABER Asia Pacific Pte Ltd., Singapore

FAULHABER Asia Pacific Pte Ltd.

Blk 67 Ubi Road 1, #06-07 Oxley Bizhub

Singapore 408730

Tel.: +65 6562 8270

Compotech Provider AP

Gustavslundsvägen 145, 4 tr

167 51 Bromma

Tel.: +46 (0) 8 441 58 00


56 (bldg. 32), Shosse Enthusiastov

111123 Moscow

Tel.: +7 495 2214 052

Building of FAULHABER Polska sp. z o.o., Poznan, Poland

FAULHABER Polska sp. z o.o.

Ul. Górki 7

60-204 Poznan

Tel.: +48 61 278 72 53

FAULHABER Malaysia Sdn Bhd

1A-2-01 & 02 · One Precinct · Lengkok Mayang Pasir

11950 Bayan Baru · Penang · Malaysia

Tel.: +60 4 619 2570

Swiss Amiet Co., Ltd.

W-903, SK V1 Center, 11 Dangsan-ro 41-g

Yeongdeungpo-gu,07217, Seoul

Tel.: +82 (0) 2 783 4774

Shinkoh Electronics Co., Ltd.

Tokyo Sales Office, Motor Sales Division8F, REID-C OMORI building, 6-20-8

Minami-oi, Shinagawa-ku, Tokyo 140-0013

Tel.: +81 (0) 3 6404 1003

Building of FAULHABER Italia S.r.l., Lomazzo, Italy

FAULHABER Italia S.r.l.

Via Cavour 2

22074 Lomazzo CO

Tel.: +39 0236714708

Inteltek Automation JV

S.No. 100/5, Ambegaon

Pune - 411046

Tel.: +91 (0) 20 39392150

Lewenstein Technologies Ltd.

1 Ha'arava St. Givat Shmuel

5400804 Israel

Tel.: +972 3 9780 800

Electro Mechanical Systems Ltd.

Eros House, Calleva Industrial Park, Aldermaston

Reading, RG7 8LN

Tel.: +44 (0) 118 9817 391

Building of FAULHABER France SAS, Montigny-le-Bretonneux, France


Parc d’activités du Pas du Lac2, Rue Michaël Faraday

78180 Montigny-le-Bretonneux

Tel.: +33 (0) 1 30 80 45 00


Passeig Ferrocarrils Catalans 178

Cornellà de Llobregat 08940 (Barcelona)

Tel.: +34 93 422 70 33


Suokalliontie 9

01740 Vantaa

Tel.: +358 (0) 9 5259 230

Routech s.r.o.

Dr. Milady Horákové 185/66

460 06 Liberec

Tel.: +420 489 202 971

Compower ApS

Marielundvej 29

2730 Herlev

Tel.: +45 (0) 44 92 66 20

Marte Científica e Instrumentação Industrial Ltda

Av Fco Andrade Ribeiro 430

37540-000 Santa Rita do Sapucai, MG

Tel.: +55 (11) 3411 4500

Building of FAULHABER Drive System Technology (Taicang) Co., Ltd.,Taicang, China

FAULHABER Drive System Technology (Taicang) Co., Ltd.

Eastern Block, Incubator Building, No. 6 Beijing Road West

Taicang 215400, Jiangsu Province

Tel.: +86 (0) 512 5337 2626

Building of FAULHABER Benelux B.V., Eindhoven, Netherlands


High Tech Campus 9

5656 AE Eindhoven

Tel.: +31 (0) 40 85155-40

Building of FAULHABER Austria GmbH, Wien, Austria


Modecenterstraße 22/C89

1030 Wien

Tel.: +43 1 7963149-0

ERNTEC Pty. Ltd.

15 Koornang Road

Scoresby, VIC 3179

Tel.: +61 3 9756 4000

Fax: +61 3 9753 4000

Building of Dr. Fritz Faulhaber GmbH & Co. KG, Schönaich, Germany



Faulhaberstraße 1

71101 Schönaich

Tel.: +49 7031 638 0

Fax: +49 7031 638 100

We are sorry

FAULHABER is currently not represented in the selected country.

Please contact us with your request at

Jan-Christopher Mohr

Area Sales Manager

Tel.: +49 (7031) 638 158

Michael Schütte

Area Sales Manager

Tel.: +49 (7031) 638 456

Daniel Brönnimann

Area Sales Manager

Tel.: +41 (0) 79 570 0814

Rolf Leitner

Regional Sales Manager

Tel.: +41 (0) 79 422 3348

Rafael Steinemann

Area Sales Manager

Tel.: +41 (0) 79 932 1645

Brushless motor for Space valve fuel header

One way to control cost is by optimizing fuel burned during launch to minimize waste. A specially developed fuel-trim valve guarantees optimum performance in this situation. It is driven by robust and reliable servomotors made by FAULHABER.

Modern launch vehicles use the rocket fuel RP-1, a highly refined type of kerosene, which must be mixed with oxygen for combustion. On the launch vehicle, 4-in pipes run from tanks of RP-1 and liquid oxygen (LOX) to combine prior to entering the combustion chamber.

The combustion chemistry of RP-1 is forgiving. The fuel won’t burn without oxygen, but as long as oxygen is pr­e­s­­ent, the two do not necessarily need to be combined in a precise ratio. The pr­o­b­lem is, however, that if the ratio of LOX to RP-1 varies from the optimum mix, ­either the oxygen will run out before the fuel or the fuel before the oxygen. However, as soon as the combustion ends, the remainder becomes unwanted ballast. To ensure this doesn’t happen, ­the fuel-trim valve adjusts the mixture in real time.

The fuel-trim device consists of a servo-motor-controlled butterfly valve. To achieve the proper speed and torque, the design incorporates a planetary gearbox for a roughly 151:1 reduction ratio, plus additional gearing internal ­to the unit. The team qualified the­ components with a significant safety margin to protect against common-mode failure. The shaft of the motor inter­faces with the valve directly to make ­fine adjustments.

Brushless motor for Space valve fuel rocket
Brushless motor for Space valve fuel engine
The fuel-trim valve is located directly above the engine where the pipes of RP-1 fuel and liquid oxygen converge, to ensure a consistent drainage of both tanks.

Extreme operating conditions

Accuracy aside, the characteristics most applications require from servomotors tend to be high torque, high speed or small in size. In the case of the fuel-trim valve,­ the chief motor requirement was simple: They had to survive launch. Extreme shocks and vibrations occur in particular during the first stage. During the approx. 3 minutes of combustion of­ a rocket stage, the engine produces a thrust of about 440,000 kN, causing immense forces to act on the fuel-trim valve in the direct vicinity.

When the engineering team set out to qualify components for the fuel-trim valve, vibration testing caused motor after motor to fail. To minimize points of failure, they switched from brushed to brushless motors. The most important criterion in this context was: Can the motor survive these operating conditions? That meant that the gearbox had to be able to withstand the load, the Hall effect sensors had to remain undamaged, in short – no failure could be allowed to happen in this extreme operating environment. Searching for a manufacturer whose motors survive these ordeals, the engineers came across FAULHABER.

Brushless motor for Space valve fuel first stage
The first rocket stage includes five engines, each of which is equipped with a fuel-trim valve operated by a servomotor that ensures uniform fuel combustion.

Rocket engines do not only produce vibrations, of course, but also heat. How­ever, the heat management – contrary to what one might expect – doesn't pose any particular challenges in this application. Much of the heat is radiated ­and is reflected away. Interestingly, the ­thermal issue he does mention is low, ­not high temperatures. For exam­ple, ­during the operation of the second stage, the engines may fire only briefly. The vehicle can then coast for as long as ­45 minutes before a second burn phase takes place. By this point, the rocket is outside of the atmosphere, where temperatures can be quite low.
To control cost and production timelines, the philosophy is to try to work with stock components whenever possible. No extra effort on FAULHABER's part was required to increase robustness for the application - the developer team simply ordered standard products.
The engineers also used FAULHABER's express prototyping program and thus were able to obtain the required samples in very short time frames.

Brushless DC-Motors
High efficiency slotless design
High-torque or high-speed with small size and low weight
Highly dynamic acceleration and deceleration
Low Noise
Available with a wide range of sensor options or sensorless

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