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Control method of bridge electric transverter

A technology of inverters and modules, applied in the direction of electronic commutation motor control, electronic commutator, electrical components, etc., can solve problems such as electric shock and damage to rotor bearings

Inactive Publication Date: 2005-08-31
GEBRHARDT VENTILATION EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when touching the rotor, there will be dangerous situations such as electric shock, and a more special problem in practice is that when the common mode voltage of the rotor leaks, the current flowing through the rotor bearing will damage the rotor bearing

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  • Control method of bridge electric transverter
  • Control method of bridge electric transverter
  • Control method of bridge electric transverter

Examples

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Embodiment Construction

[0024] Fig. 1 is a schematic diagram of the device for realizing the present invention, UI is the input terminal voltage of the input stage PFC, and the above input stage provides the coupling loop voltage UZK to the bridge type power converter UM. The input stage PFC is provided with, for example, a rectifier for rectifying the input voltage UI and a buffer capacitor CK (see FIG. 2 ). In addition, the input stage PFC is equipped with a so-called power factor controller (Power-Factor-Controller) which regulates the coupling circuit voltage UZK, by means of which the load applied on the input side via the network represented by the input voltage UI As far as possible only for 1 ohm resistors. In this embodiment, the bridge type power converter UM is a so-called three-phase six-pulse bridge type power converter, which provides the motor MO through the wires LA, LB, LC, which basically consists of rectangular voltage information resistors. (Spannungsbloecke) The three-phase volt...

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Abstract

A control-module for a bridge-converter (UM) is suggested to commutate the currents (IA, IB, 1C) for a motor (MO). The bridge-converter (UM) has bridge-branches (A, B, C) with an upper switch (HSA, HSB, HSC) and an under switch (LSA, LSB, LSC) respectively and some tapping lines (LA, LB, LC) arranged respectively between each upper and under switch to apply an output-voltage (UA, UB, UC) to the motor-windings (XA, XB, XC) of the motor. The control-module controls with pulse-sending-device (PG) the switch with switch-pulses (T11, T12) according to the respective rotor-state of the motor (MO), so that at least one bridge-branch (C) is inactive, where the upper and under switch (HSC, LSC) are open, while other two bridge-branches (A, B) are active in pair, where in each active bridge-branch (A, B) either the upper switch (HSA, HSB) is open and the under switch (LSA, LSB) is closed or vice versa. In addition, the active bridge-branches (A, B) operate in counter-clock.

Description

technical field [0001] The invention relates to a control module of a bridge-type power converter for motor current commutation. The above-mentioned bridge-type power converter has at least three bridge branches powered by a DC voltage intermediate circuit, and each branch has a An upper switch and a lower switch, each pair of upper switches and lower switches has a tap between them, so as to supply the output voltage to each motor winding on the motor, wherein the above-mentioned control module controls the switch through a pulse transmitter (Pulsgebermitteln) to generate a pass On-off pulse, by means of the above-mentioned on-off pulse control module to adjust the output voltage on each winding of the motor. The invention also relates to a ventilator unit for a bridge power converter equipped with a control module of the type described above. Background technique [0002] More recently, especially in ventilators, so-called electronically commutated DC motors, also known a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/48H02M7/527H02P6/08
CPCH02M7/48H02M7/527H02P6/085
Inventor 路茨·格贝尔彼德·克劳斯布迪希
Owner GEBRHARDT VENTILATION EQUIP