DE1463304B2 - VOLTAGE REGULATOR FOR A SHUNT GENERATOR / WITH A POWER TRANSISTOR IN LINE WITH THE FIELD WINDING - Google Patents

Description

1 2

The invention relates to a voltage regulator for stand with a constant resistance value, the

a shunt generator (DC generator; equals the resistance value of the conductive diode,

AC or three-phase generator with downstream would be used. The diode thus causes the required

tetem rectifier) with one in series with the borrowed positive feedback and keeps the change

Field winding lying power transistor, a 5 in the collector voltage of the power transistor

Complementary to this, this controlling tax transfer is relatively small. The difference between the

sistor and a Zener diode as setpoint generator as well as voltage at which the power transistor becomes conductive,

with a feedback that switches an oscillator against the voltage at which it becomes non-conductive,

operation of the transistors causes. is, however, of the mentioned change in the collector

It is known that voltage-dependent transistors in voltage regulators are as low as

to use. Two different types must be kept possible.

Transistors used; for example, a p-n-p- is shown in the drawings

Transistor controlled by an n-p-n transistor. Fig. 1 is a circuit diagram showing an execution

In addition, in the voltage divider circuit, which is the example of the invention, and the

Control transistor influences, a Zener diode between 15 Fig. 2 a suitable type of semiconductor crystals,

switched (U.S. Patent 2,892,143). which form the main part of the circuit.

In another known voltage regulator, in FIG. 1 is a positive and a negative the emitter of a power transistor with an output terminal 6, 7 at the output of a DC input terminal connected to the alternator via a p-n generator 8, which has a load 9 in Semiconductor connected (Austrian patent specification 20 shape of a battery powered. The Klem-219 715). Men 6, 7 are connected to each other via two parallel lines

In these known voltage regulators, the lines are connected, one of which is a diode 10

Disadvantage that the power transistor mainly and a resistor 11 in series and the other

to the extent of its conductivity, d. H. continuous, contains resistors 12, 13 and 14 in series. Further

is controlled and as long as it is in the conductive supply 25 is the emitter of a control transistor 15 from

stand is located acts as an amplifier, so that the p-n-p type via a resistor 16 at terminal 6

Energy consumption of the circuit is very high. and is via a Zener diode 17 with a variable

In a further known circuit for a ble tap on the resistor 13 is connected. the Voltage regulators are two similar transistors, the base of the control transistor 15 is connected to terminal 6 namely, a control 30 influenced by a Zener diode is connected via the diode 10, while its Kol transistor and a lector in series with the field winding at the base of a power transistor 18 from lying power transistor over a capacitor n-p-n-type. The collector of the power transistor is fed back, so that the power transistor suppressor 18 is connected to the terminal 6 via the diode 10 is fully conductive or completely blocked, and its emitter is connected to terminal 7 (U.S. Patent 2,992,381). In addition to the compli- 35 a field winding 19 of the generator 8 is connected, The structure of this well-known circuit has the following characteristics: known voltage regulators still have the disadvantage when the voltage at terminals 6, 7 is low, that its circuit is extremely difficult, the diode 10 and the resistor 11 act as Spanzu to be integrated into a unit. voltage divider, so that the collector voltage of the

It is also known that in the case of a transistor span 40, the power transistor 18 is at a negative potential

voltage regulator for a direct current generator which, with reference to the emitter voltage of the control

the transistors and the auxiliary control electrode from sistor 15 is located. This will make the tax transfer

to produce a single semiconductor crystal (ster- sistor 15 kept in the conductive state, and the

Reich patent specification 214 529). Current flowing through it keeps the power

The invention is based on the object of providing a 45 transistor 18 in the switched-on state so that the voltage regulator of the above type whose full current is simple through the field winding 19 of the generator structure and which flows in as few tor 8 as possible.
Operations can be produced. If the voltage at terminals 6, 7 increases,

This object is achieved in that the field increases also the voltages at the resistor 16 winding in the emitter circuit of the power transistor 50 and at the diode 10. As is well known, the diode works is connected so that the feedback of the two takes place as a constant and relatively small resistance transistors via a diode, which is in the collector when a substantial current flows through it, gate circuit of the power transistor is, and that both the transistors 15 and 18 - are thus in the conducting transistors as well as the diode an integrated unit kept the state even though the voltage rises, form. 55 Meanwhile, the Zener diode 17 is ignited when

The particular advantages of the invention a predetermined tension is achieved, after which the

In the integrated design, the voltage regulator emitter voltage of the control transistor 15 is constant

justified, which is kept by the special circuit of the. Now the collector voltage of the increases

two complementary transistors and the diode power transistor 18 continues with the result,

has been made possible. 60 that the control transistor 15 is turned off. In order to

Using a diode in place of one also turns transistor 18 off. The UmWiderstandes also brings about better control intrinsic switching of the transistors 17, 18 from the conductive shafts. If the power transistor is switched to the non-conductive state due to the switching, the current flowing through the diode, feedback through the diode 10, falls very quickly,
65 The transistors 15 and 18 and the diode 10 are a relatively high resistance as shown in FIG. 2 combined in a single crystal. The crystal contains two n-layers 21, 22, which are not as high as if a p-layer 23 are separated by a power transistor. The n-layer 21

holds another p-layer 24. The emitter, the base and the collector of the power transistor 18 are [formed by layers 22, 23 and 21 respectively, while the emitter, the base and the collector of the control transistor 15 are correspondingly formed by layers 24, 21 and 23, respectively.

The diode 10 is formed by an extra-p-layer 25 on the layer 21, so that the diode from the Layers 25 and 21 consists.

The resistor chain 12, 13, 14 allows tuning the voltage at which regulation begins. jIn addition, one of the resistances 12, 14 a temperature compensation can be obtained as a temperature-sensitive resistor.

The resistor 11 can be omitted if the leakage current of the power transistor 18 is at least is as large as the leakage current of the diode 10.

Claims (1)

Claim: Voltage regulator for a shunt generator with one in series with the field winding lying power transistor, a complementary, this controlling control transistor and a Zener diode as a setpoint generator and with a feedback that an oscillator switching operation of the transistors, characterized in that the field winding (19) in the emitter circuit of the power transistor (18) is connected so that the two transistors (15, 18) are fed back via a diode (10), which is in the collector circuit of the power transistor (18), and that both transistors (15, 18) and the diode (10) form an integrated unit. 1 sheet of drawings