KR100330878B1 - erasing device electromagnetic wave noise of heater machine for vehicle - Google Patents

Abstract

The present invention relates to a vehicle heater electromagnetic noise removing device that can remove the electromagnetic noise emitted from the permanent magnet inside the floor motor mounted on the heater heating device used in the vehicle, so as to bring hot heat into the vehicle. A motor unit 10 connected to a brush of a permanent magnet inside the follower motor M that rotates at a predetermined speed or more so as to remove a resonant frequency of electromagnetic noise; A through type capacitor (C2) connected to the output terminal of the motor unit 10 to allow the output rotation to penetrate therein to remove the electromagnetic wave, and is connected in series to the output terminal of the through type capacitor (C2) to reduce the electromagnetic noise. A filter unit 20 to which coils L1 and L2 to be attenuated are connected; A capacitor (C3) (C4) (C5) connected to the output of the coil (L2) in the filter unit (20) in parallel to attenuate and remove the remaining electromagnetic noise, and applied to the output of the capacitor (C3). By the configuration that the capacitor unit 30 equipped with the varistor (VD1) for changing the resistance value non-linearly according to the change of the voltage is attenuated or removed by the electromagnetic noise, the engine control device and the electronic It has the effect of preventing electromagnetic wave noise propagation to external parts such as products.

Description

Erasing device electromagnetic wave noise of heater machine for vehicle

The present invention relates to a vehicle heater electromagnetic noise removing device that can remove the electromagnetic noise emitted from the permanent magnet inside the floor motor mounted on the heater heating device used in the vehicle.

In general, a weak electromagnetic wave emitted from an automobile is hindered by radio waves of various wireless communications, televisions, radios, and the like. In addition, the electronic devices and wireless devices mounted in the vehicle may be disturbed. Sources from such automobiles are mainly pulse noise caused by spark discharges generated from the engine's ignition device, and the magnitude and frequency components continue to fluctuate. Sources of interference such as wipers, alternators, etc. It is included.

The electromagnetic wave attenuation circuit for the blower motor device used in the conventional vehicle invented to remove the electromagnetic waves is a high frequency band in the electromagnetic wave radiated and conducted from the blower motor (M) of the heater device as shown in FIG. The through-type capacitors (C1) and (C2), which absorb electromagnetic noise of the device and lower the impedance, are connected to both sides of the blower motor (M), and are connected to the next stages of the through-type capacitors (C1) and (C2), thereby remaining electromagnetic waves in the high frequency band. The noise is shielded and attenuated by filtering with a noise filter (NF) consisting of a plurality of coils (L1) (L2) and ceramic capacitors (C3-C5), and the electromagnetic wave of the broadband of electromagnetic waves not blocked by the absorption and shielding elements. Noise is absorbed and shielded through the heat conductor 2, which the conductor is wound one or more times, and converted into heat energy. Except for the above elements, each of the above elements is configured to thermally convert electromagnetic noise by grounding the vehicle body.

The electromagnetic noise reduction circuit for the conventional heater device configured as described above generates electromagnetic noise from the brush and yoke coil configured inside the blower motor (M) of the heater device, and the electromagnetic noise conducted through the wire from the blower motor (M) is While passing through the through-type capacitors (C1) and (C2) formed on both sides of the blower motor (M), the electromagnetic wave noise in the high frequency band is absorbed. The absorbed electromagnetic noise is bypassed by the vehicle body and disappeared. The type capacitors C1 and C2 are inserted as close as possible to the blower motor M to lower the impedance of the electromagnetic noise and are absorbed.

In the noise filter (NF), which consists of a plurality of coils (L1) (L2) and ceramic capacitors (C3-C5) in series and parallel to the next stage of the through-type capacitors (C1) and (C2), the residual electromagnetic waves in the high frequency band The shielding material has a large attenuation amount of electromagnetic wave noise for filtering, and the attenuation action is performed, and the wideband electromagnetic wave noise conducted by winding the conducting wire drawn from the noise filter (NF) to the heat conductor 2 at least once is converted into thermal energy. Electromagnetic waves, which are emitted and conducted along the conducting wire passing through the heat conductor 2 more than once using a ferrite core, are converted into heat energy by the absorption and shielding action of the heat conductor 2 and emitted into the vehicle body. In this way, the electromagnetic wave noise generated from the blower motor (M) of the heater unit for heating and conducting is connected to the absorber and shielding element in multiple stages, thereby connecting other components, electronic devices, and security parts. It aimed to promote safe operation by preventing human and physical damages from possible safety accidents by excluding the negative influences that may affect the equipment.

However, the electromagnetic noise reduction circuit of the conventional heater unit has a permanent magnet embedded in the motor inside the heater, so that electromagnetic noise is generated by friction with the brush, and when the engine is stopped or operated at an undesired moment, the engine is affected by the electromagnetic noise. There is a problem in that malfunctions such as a radio receiver, which is transmitted to the control device and other electronic products and used inside or outside the vehicle.

The present invention is intended to solve such a conventional problem, the purpose is to connect the condenser connected to the filter unit and the varistor inside one of the contact terminal of the motor to remove the electromagnetic noise flowing into the motor inside the vehicle heater Therefore, it is possible to shock absorb electromagnetic noise.

1 is a circuit configuration diagram of a conventional vehicle heater electromagnetic noise removing device.

2 is a circuit diagram of a vehicle heater electromagnetic noise removing device according to an embodiment of the present invention.

Code descriptions for the main parts of the drawings

10; motor part 11; filter part

12; capacitor M; blower motor

C1, C3, C4, C5; Capacitor C2; Through Capacitor

L1, L2; coil VD1; varistor

Hereinafter, the technical configuration of the present invention with reference to the accompanying drawings in detail.

2 is a circuit diagram of a vehicle heater electromagnetic noise removing device according to an embodiment of the present invention.

The present invention relates to a device for removing electromagnetic noise emitted from a permanent magnet inside a floor motor mounted on a heater heating device used in a vehicle, as shown in FIG. In order to remove the resonant frequency of electromagnetic noise by connecting to the brush of the permanent magnet inside the floor motor (M) that rotates over a certain speed so that the motor unit 10 is connected to the condenser (C1) is connected. .

The motor unit 10 of the present invention is connected to the output type of the through-type capacitor (C2) and the output type of the through-type capacitor (C2) so that the output rotation is penetrated into the output terminal to the inside, the electromagnetic wave noise The filter unit 11 to which the coils L1 and L2 to attenuate is connected is connected.

The filter unit 11 of the present invention is connected to the output terminal of the coil (L2) in parallel to attenuate and remove the remaining electromagnetic noise at the same time, the capacitor (C3) (C4) (C5), and the output terminal of the capacitor (C3) The condenser portion 12 equipped with the varistor VD1 for changing the resistance value non-linearly in response to the change of the voltage applied to the condenser is connected.

Referring to the effects of the present invention configured as described in detail as follows.

The present invention relates to a device for removing electromagnetic noise emitted from a permanent magnet inside a floor motor mounted to a heater heater used in a vehicle, and as shown in FIG. When operating the circulating air inside the vehicle by blowing air by the rotational force of the blower motor (M) mounted inside the heating device to remove dew or frost on the glass surface of the vehicle and at the same time provide a warm indoor space, but blower motor (M The magnetic field is generated by the power applied from the inside of the permanent magnet to emit electromagnetic waves to the outside.

The electromagnetic wave is transmitted to the heating device and at the same time, a momentary stop or malfunction occurs when it is transmitted to a nearby wireless device, an electronic device or an engine control device. Therefore, the capacitor C1 is connected to the input / output terminal of the follower motor M of the motor unit 10. The resonance frequency of the electromagnetic noise of the follower motor M can be removed, and the filter unit 11 in which the plurality of coils L1 and L2 are connected in series to the output terminal of the motor unit 10 connects the electromagnetic wave. Only high frequency components of noise are attenuated or eliminated.

The filter unit 11 allows the electromagnetic wave output from the motor unit 10 to be partially removed while passing through the inside of the through-type condenser C2, and coils L1 and L2 having the remaining electromagnetic noise connected in series. It will be attenuated while going through.

In addition, the attenuated electromagnetic waves are completely removed through the condenser 12 connected to the plurality of condensers C3, C4, and C5 at the output terminal of the filter unit 11. The condenser unit 12 is the filter unit 11 The remaining electromagnetic noise is continuously removed through the internal capacitors C3, C4, and C5, and the varistor VD1 connected to the output terminal of the capacitor C3 receives the remaining electromagnetic noise. The internal resistance value that changes according to the inflow impacts the electromagnetic noise, so that the electromagnetic noise is absorbed and smoothly exits the ground.

The present invention, which acts as described above, connects a filter part and a varistor connected to a capacitor part connected to one contact terminal of the motor so as to remove the electromagnetic noise flowing into the motor inside the vehicle heater. It is easily exited and has an effect of preventing electromagnetic noise propagation to external components such as an engine control device and an electronic product.

Claims (1)

Motor part to which condenser (C1) is connected to remove the resonant frequency of electromagnetic noise by connecting to the brush of permanent magnet inside the floor motor (M) that rotates over a certain speed to bring hot heat into the vehicle ( 10); A through type capacitor (C2) connected to the output terminal of the motor unit 10 to allow the output rotation to penetrate therein to remove the electromagnetic wave, and is connected in series to the output terminal of the through type capacitor (C2) to reduce the electromagnetic noise. A filter unit 20 to which coils L1 and L2 to be attenuated are connected; A capacitor (C3) (C4) (C5) connected to the output of the coil (L2) in the filter unit (20) in parallel to attenuate and remove the remaining electromagnetic noise, and applied to the output of the capacitor (C3). Vehicle electromagnetic wave noise removing device is formed by connecting the condenser unit 30 is equipped with a varistor (VD1) for changing the resistance value non-linearly according to the change in voltage.