Motor with RPM pickup via a hall sensor

Details Motor with RPM pickup via a hall sensor Motor with RPM pickup via a hall sensor

1998-10-07

2000-10-03

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Rotary

310 71, 310238, 310239, 310DIG3, 310DIG6, H02K 1100

Patent

active

061277525

DESCRIPTION:

BRIEF SUMMARY
PRIOR ART

The invention is based on a motor in which signals from a shaft are picked up by means of a Hall sensor,
One such motor is known from German Patent Disclosure DE 43 26 391 A1. The motor is a direct current motor with a commutator, and it has a motor housing and a rotor with a rotor shaft, the rotor being drivable in two rotational directions. The rotor shaft is supported in two bearing end plates that close off the motor housing on two sides. A two-pole magnet rotor body is fixedly mounted on the rotor shaft. A Hall sensor is disposed on a circuit board embodied as an assembly component, which is plugged from outside into a recess of the bearing end plate. The recess has a bottom face that has a closed, indented chamber. The chamber protrudes from the inside of the bearing end plate and has a chamber wall facing the magnet rotor body. The Hall sensor is disposed behind the chamber wall at the level of the magnet rotor body and senses signals of the magnet rotor body. On the front side of the circuit board, pointing toward the magnet rotor body, electrical components are provided, such as a Hall sensor, resistor, etc. In the region of their terminal ends, power supply lines and signal lines of the electrical components are guided from the front side to the back side of the circuit board through recesses of the circuit board; the stripped terminal ends are inserted through through openings from the front side to the back side of the circuit board so as to be contacted with conductor tracks on the back side. The power supply lines and signal lines are guided through an insulating sleeving and are connected to a push-on sleeve housing that forms an assembly unit with the circuit board.
Because of the additional chamber that protrudes from the inner edge of the bearing end plate, greater installation space is needed. A bearing end plate with such a chamber and the resultant dimensions is suitably used only in motors with a Hall sensor. The magnet rotor body is spaced far apart from the Hall sensor, being disposed behind the chamber wall. This dictates a large installation space. Moreover, the magnet must be designed with greater strength, so that over the great distance and through the chamber wall it can pick up the signals. A stronger magnet increases the installation space and the weight, so that the magnet has a greater effect on the shaft rotation, and increased energy is required for driving. Because power supply lines and signal lines are passed through an insulating sleeving and are guided with traction relief in recesses, greater assembly effort and expense are required on the one hand, and on the other the weight and costs rise because of the many individual parts in the installation space.
The motor is used in particular in motor vehicles as a drive motor for raising windows, actuating a sunroof, adjusting seats and mirrors, and so forth. Especially in these applications, there is a need for a small, lightweight construction.


ADVANTAGES OF THE INVENTION

The motor of the invention has the advantage that because of the injected and/or plugged-in soldered pins or contact shoes, the circuit board can be made very small and embodied economically, so that it can be integrated into an existing component of the motor, which is needed even without Hall sensors, and thus requires no additional installation space. The term "integrated" is understood in this connection to mean that the circuit board is inserted into a component, for instance being plugged into it, in such a way that the external dimensions of the component are not increased, or in other words that an existing available space is utilized. If contacts, power supply lines and signal lines for the circuit board are injected and/or plugged into the component, then again installation space is saved, so that as a result again no additional installation space is needed. The contacts and the lines can all be injected, or all encapsulated, or inserted in combined fashion in the component. If the parts are plugged in, production can be made m

REFERENCES:
patent: 4614886 (1986-09-01), Schneider et al.
patent: 4847528 (1989-07-01), Eguchi et al.
patent: 5086243 (1992-02-01), Hofmann
patent: 5184039 (1993-02-01), Kraft
patent: 5319277 (1994-06-01), Materne et al.
patent: 5382857 (1995-01-01), Schellhorn et al.
patent: 5444315 (1995-08-01), Adam et al.
patent: 5528093 (1996-06-01), Adam et al.
patent: 5565721 (1996-10-01), Knappe
patent: 5668422 (1997-09-01), Deynet
patent: 5747911 (1998-05-01), Kikly

Affiliated with

Also associated with

Rating

Motor with RPM pickup via a hall sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Motor with RPM pickup via a hall sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Motor with RPM pickup via a hall sensor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-198656