Device for the generation of regulated and/or adjustable direct voltages or direct currents

• US 4,593,348 A
• Filed: 04/16/1984
• Issued: 06/03/1986
• Est. Priority Date: 04/16/1983
• Status: Expired due to Fees

• Current Assignee: Autola Stromrichter GmbH & Company KG
• Original Assignee: Autola Stromrichter GmbH & Company KG
• Inventors: Tewesmeier, Werner
• Primary Examiner(s): Wong, Peter S.
• Assistant Examiner(s): JONES, JUDSON
• Application Number:
  US06/600,500
• Time in Patent Office: 778 Days
• Field of Search: 363/41, 363/96, 363/97.85, 363/67, 363/70, 323/241, 323/283, 323/322, 323/267, 320/9, 320/13, 320/2, 320/14, 320/21
• US Class Current: 363/85
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02M 1/0845 digitally controlled (or with digital control)

Abstract

A device is described for the generation of drive signals for thyristors or power transistors in circuits for the energy supply of apparatuses and installations with regulated and/or adjustable direct voltages or direct currents. In systems with a master or controlling computer there serves as desired value giver a digital memory, which makes available the calculated desired values as a binary number on its output, while as actual-value giver there serves a binary counter which counts the beat impulses of the computer, in which system a comparison circuit on equality of the numbers triggers an impulse the time beginning of which corresponds to the ingate angle or its duration to the impulse width of a pulse-width modulated signal. A control device controls the reading of the desired values into the memory and of the actual values into the counter and synchronizes the impulses of the comparison circuit with synchronizing impulses derived from the mains voltage or from the beat impulses of the master or controlling computer.

Claims

1. A device for the generation of regulated and/or adjustable direct voltage or direct currents with use of semiconductor elements in the form of thyristors or power transistors, with an impulse generator for the generation of synchronizing impulses of prescribed frequency, with an actual value giver controlled according to provision of the impulse generator, with a desired value giver that delivers desired values which are a measure for the required direct voltage or for the required direct current, and with a comparison circuit which compares the output of the actual value giver with the desired values and on equality delivers in each case a drive signal for the semiconductor element, characterized in that the device forms part of a battery maintenance circuit containing a thyristor circuit (6) and a transistor circuit (7) in a system with a controlling computer (8) as desired value giver, a digital memory (1) which makes available on its output the desired values calculated by the controlling computer (8) as a binary number, a binary counter (2) as an actual value giver which counts the beat impulses of the controlling computer, the comparison circuit (3) is formed in such a way that on equality of the numbers of the memory (1) and of the counter (2) it triggers an impulse the time beginning of which corresponds to the ingate angle for the thyristor circuit for the charging of the battery to be maintained, and its duration to the impulse width of a pulse-width modulated signal for the transistor circuit for the discharging of the battery to be maintained, and that a control device (4) is provided which receives control signals from the controlling computer (8), which controls the reading of the desired values into the memory (1) and of the actual values into the counter (2), and which synchronizes the impulses delivered from the comparison circuit (3) with the synchronizing impulses delivered from the impulse generator and drives the semiconductor element, and the control device (4) contains a switch-over arrangement in combination with a locking circuit, which brings about a conduction onward of the signal either only to the thyristors for charging the batteries to be maintained or only to the power transistors for discharging the batteries to be maintained.

2. Device according to claim 1, characterized in that the binary counter (2) is a 16-stage counter.

3. Device according to claim 2, characterized in that the impulse generator for the generation of synchronizing impulses for the drive of thyristors consists of an impulse-former stage (5) which generates from the mains voltage a 100 Hz impulse sequence, the beginning of the impulses corresponding in each case to the zero crossing of the mains alternating voltage.

4. Device according to claim 2, characterized in that the counter (2) serves additionally as impulse generator for the generation of synchronizing impulses for the operation of power transistors, as it gives off an impulse sequence of constant frequency.

5. Device according to claim 1, characterized in that the impulse generator for the generation of synchronizing impulses for the drive of thyristors consists of an impulse-former stage (5) which generates from the mains voltage a 100 Hz impulse sequence, the beginning of the impulses corresponding in each case to the zero passage (Nulldurchgang) of the mains alternating voltage.

6. Device according to claim 1 characterized in that the counter (2) serves additionally as impulse generator for the generation of synchronizing impulses for the operation of power transistors, as it gives off an impulse sequence of constant frequency.