ebm-papst Press Release

Press release
Anja Nießner
Presse & Öffentlichkeitsarbeit
Independent automatic transmission control
ebm-papst St. Georgen
Hermann-Papst-Straße 1
78112 St. Georgen
Compact ECI motors provide hydraulic pressure
Electro-hydraulic control in the automatic transmission of automobiles requires the
permanent application of a constant oil pressure to supply the actuators. An arrangement in
which the pumps used for this purpose are driven by the combustion engine has its
disadvantages: They either have to be re-started after every stoppage or run constantly in
stand-by mode with a bypass valve. So there is a need for new solutions, particularly in
conjunction with modern energy-saving concepts such as automatic start/stop, hybrid drives
and gearbox "sailing mode". This is where compact, powerful electric motors supplying the
necessary oil pressure really come into their own.
As automatic transmissions require the constant application of hydraulic control pressure,
the inevitable leakage oil has to be replaced. Electrically driven oil pumps only operate when
oil is actually required. Which is why the drive specialists from ebm-papst St. Georgen (see
box) have developed an alternative concept to the mechanically operated control pressure
pump: Electronically commutated DC motors (ECI) in the oil sump only drive an oil pump
when necessary and independently of any mechanical connection. This paves the way for
optimum electronic transmission management.
The experts from the Black Forest make use of dynamic internal rotor motors (photo) which
operate in the oil sump. The drives must function reliably with cold oil at low speed with high
torque and with hot oil at high speed with low torque. The space available in the oil sump of
an automatic transmission varies greatly and often requires extreme solutions: A short motor
with a large diameter or exactly the opposite, in other words a long, slim motor. This makes
the NAG3, IEP and DL382 motors with stack diameters of between 40 and 76 mm and
differing lengths the ideal basic components to enable power, torque and design to be
adapted to user requirements. The wet rotor motors provide full coverage of the range from
100 mNm to 2000 mNm or 40 to 500 W output power. Thermally stable high-performance
magnets permit applications at operating temperatures from well below 0°C to above 100°C.
Specially selected materials and varnishes are able to withstand even corrosive additives in
the oil. Customized electrical contacts and design versions are possible - for instance,
integration of a pump flange into the motor end shield to reduce the number of interfaces.
Motor manufacturing with coordinated process control in combination with an analytical
laboratory for constant production monitoring guarantees one hundred per cent quality
assurance.
Photo
Telefon: +49 7724 81-1311
Telefax: +49 7724-81- 51311
[email protected]
21. September 2015- Blatt 1 von 2
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Telefon +49 7938 81-7105
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www.ebmpapst.com
www.greentech.info/ec-technologie
Robust oil pump system with excellent dynamic operation even at high oil
temperatures. (ebm-papst)
ebm-papst St. Georgen GmbH & Co. KG
Hermann-Papst Str. 1 ·78112 St. Georgen ·Phone: +49 7724 81-0 ·www.ebmpapst.com ·[email protected]
Press release
Anja Nießner
Presse & Öffentlichkeitsarbeit
Independent automatic transmission control
ebm-papst St. Georgen
Hermann-Papst-Straße 1
78112 St. Georgen
Compact ECI motors provide hydraulic pressure
Über ebm-papst
Die ebm-papst Gruppe ist der weltweit führende Hersteller von Ventilatoren und Motoren.
Seit Gründung setzt das Technologieunternehmen kontinuierlich weltweite Marktstandards:
von der Marktreife elektronisch geregelter EC-Ventilatoren über die aerodynamische
Verbesserung der Ventilatorflügel bis hin zur ressourcenschonenden Materialauswahl u. a.
mit Biowerkstoffen.
Im Geschäftsjahr 2014/15 erzielte das Unternehmen einen Umsatz von knapp 1,6 Mrd. €.
ebm-papst beschäftigt rund 12.000 Mitarbeiterinnen und Mitarbeiter an 18
Produktionsstätten (u. a. in Deutschland, China und den USA) sowie 57 Vertriebsstandorten
weltweit. Ventilatoren und Motoren des Weltmarktführers sind in vielen Branchen zu finden,
wie zum Beispiel in den Bereichen Lüftungs-, Klima- und Kältetechnik, Haushaltsgeräte,
Heiztechnik, IT und Telekommunikation, Pkw- Applikationen und Nutzfahrzeugtechnik.
ebm-papst St. Georgen GmbH & Co. KG
Telefon: +49 7724 81-1311
Telefax: +49 7724-81- 51311
[email protected]
21. September 2015- Blatt 2 von 2
Kontakt zur Pressestelle
Unternehmensgruppe
Telefon +49 7938 81-7105
twitter.com/ebmpapst_news
facebook.com/ebmpapstFANS
youtube.com/ebmpapstDE
www.ebmpapst.com
www.greentech.info/ec-technologie
Hermann-Papst Str. 1 ·78112 St. Georgen ·Phone: +49 7724 81-0 ·www.ebmpapst.com ·[email protected]