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US 4,734,603 AGranted
Motor control mounting
AssigneePapst-Motoren GmbH & Co. KG
InventorsJohann von der Heide, Georg F. Papst, Rolf Mueller
Life of this patent
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AssigneePapst-Motoren GmbH & Co. KG
InventorsJohann von der Heide, Georg F. Papst, Rolf Mueller
Estimating the term…
To lessen mounting time and to optimize positioning of the Hall generator, the Hall generator and control electronics influenced by the generator so as to actuate a brushless dc motor are arranged on a common substrate and are provided with a common protective envelope whose dimensions are somewhat narrower than the cross-section of the motor slot. This substrate is inserted in the motor slot so that the Hall generator is located outside the slot and in the effective magnetic field of the motor's permanent magnet.
A brushless d.c. motor having a rotor with a magnetic field, a stator, slots in the stator having a given width and cross section, a winding system held in the cross section of the slots of the stator, electronic controls controlling current in the winding system and a Hall device detecting the position of the rotor and providing a control signal for the electronic controls to regulate the motor, the motor further comprising an elongated substrate mounting both the Hall device and the associated electronic controls;
Dependencies are inferred from the claim text.
No related US applications are recorded in the indexed filing history.
With position sensing devices: using magnetic effect devices, e.g. Hall-plates, magneto-resistors
Dynamo-electric machines
Term ended 4 Jun 2006 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
The present invention concerns a brushless dc motor provided with electronic controls influenced by a Hall generator.
Motors of this type are provided with a means of detecting the position of the rotor, which takes the form of a Hall generator, and they are also provided with electronic amplification to generate the signal from the Hall device which is employed to regulate rotor speed.
Hall generators are typically positioned where the rotary magnetic field will generate a signal giving the least interference. The electronic controls are normally arranged on a mounting board which is in turn connected to the stator.
The invention will now be elucidated with the help of the following drawings, where:
FIG. 1 shows a control unit positioned in the motor slot
FIG. 2 shows a control unit provided with a frame and power supply leads
FIG. 1 shows a Hall generator 20 mounted on a substrate 10 and an electronic amplifier 30 arranged separately. The Hall generator is arranged on a chip of A3B5 compound and is connected to the amplifier 30 by means of bonding wiring 21. The entire arrangement is housed inside a plastic protective envelope 100.
If the Hall device is built up on a silicon chip, the Hall generator and the amplifier can both be arranged on a single chip. In this case, the bonding wiring can be omitted.
The supply and output leads from the amplifier are run in bonding wiring 31 to the solder support points 41, to which can be connected the power leads 40 from the power supply (not shown) and from a capacitor as well, if needed.