CZ306805B6 - Connection of the upward voltage converter - Google Patents

Abstract

Connection of the upward voltage converter is intended for medical electrotherapeutic devices. It allows optimal device structure from a competitive miniaturization viewpoint and is therefore suitable for devices requiring higher voltages while maintaining small dimensions. The connection of the upward voltage converter consists of an inverter and a multiplier, where the input voltage (Ui) is connected to the input of the first inverter (A1) whose output is connected to the input of the first multiplier (B2), and, further, the output of the first multiplier (B2) is connected to the input of the second inverter (A3) whose output is connected to the input of the second multiplier (B4) with the output voltage (U2), while all the multipliers and inverters form a functional block. Two or more functional blocks are mutually connected in the cascade way.

Description

Technical field

Electrotherapy, a power supply for a pulse generator, such as a pacemaker or neurostimulator, and other areas in which an increase in voltage is required while maintaining the small dimensions of the device.

BACKGROUND OF THE INVENTION

A voltage converter is a converter used to change the voltage of a power system. Frequency converters are also often referred to as a source (or power supply), although the actual source of electricity 15 is a power generator or battery.

For AC voltage, the voltage converter can be changed:

• size (amplitude) by transformer, • rectify it to DC voltage (rectifier).

Commonly, the inverters are used to power common mains appliances such as laptops, televisions, electric kettles, lighting fixtures, power tools (drills, power cutters, etc.), PCs, VCRs, satellites, microwaves, cookers, refrigerators, small pumps, etc. designed for 25 mains (socket) or accumulator (series connected electric cells).

In the case of supply voltages for electrostimulation, i.e. for neurostimulators or pacemakers, the battery can obtain a higher voltage after alternating with the switching process in principle in three ways:

1) Ascending transformer followed by rectification

2) Inductance expansion

3) Voltage multiplier (cascade of doublers).

The disadvantages of these solutions are especially the space requirements, especially at large voltage ratios of 35 U2 / U1 and weight, another disadvantage is the difficult stabilization of the output voltage.

SUMMARY OF THE INVENTION

These disadvantages are overcome by the solution described in this application. The solution to the above disadvantages is to provide a function block that will connect the inverter to a voltage multiplier, which is an upstream voltage converter.

This circuit consists of a cascade of inverters and voltage multipliers. It is therefore important for the connection that the input of the first inverter A1 is connected to the input voltage Uj, the output of which is connected to the input of the first multiplier B2. Furthermore, the output of the first multiplier B2 is connected to the input of the second inverter A3, the output of which is connected to the input of the second multiplier B4 with the output voltage U ₂ .

This function block can be connected several times in succession to achieve a significant increase of 50 voltages while maintaining the small dimensions of the device. Thus, the advantage of this circuit is the space saving, especially for large voltage ratios U ₂ / U ₂ , the number of inverter-multiplier double blocks is proportional to ln (U ₂ / U |). However, this connection is also functional in the case of a single inverter-multiplier function block.

CZ 306805 136

Clarification of drawings

Fig. 1 is a block diagram of a proposed wiring according to Example 2.

DETAILED DESCRIPTION OF THE INVENTION

Example 1

The ascending voltage converter is connected in such a way that, in the function block, the input of the first inverter A1 is connected to the input voltage Uj, the output of which is connected to the input of the first multiplier B2. Furthermore, the output of the first multiplier B2 is connected to the input of the second inverter A3, the output of which is connected to the input of the second multiplier B4 with the output voltage Lb.

The magnitude of the input voltage Uj is given by the diode function threshold in multipliers B. The magnitude of the output voltage Uj is determined by the maximum permissible voltage of the transistors in inverters A and the capacitors and diodes in the multipliers B2, B4.

Example 2

Example 2 differs from Example I in that two function blocks described in Example 1 and shown in Figure 1 are cascaded in the ascending voltage converter.

Example 3

Example 3 differs from the previous examples in that the number of cascaded function blocks is equal to In (U / Ui).

Industrial applicability

The connection of the ascending voltage converter is intended for medical electrotherapeutic devices. It allows optimal design of the device in terms of competitive miniaturization and is therefore suitable for equipment requiring higher voltage while keeping small dimensions.

Claims (2)

An ascending voltage converter circuit comprising an inverter and a multiplier, characterized in that the input voltage (U1) is connected to the input of the first inverter (AI), the output of which is connected to the input of the first multiplier (B2). and further the output of the first multiplier (B2) is connected to the input of the second inverter (A3), whose output is connected to the input of the second multiplier (B4) with the output voltage (U _2), each inverter and a multiplier as a functional block. An ascending voltage converter circuit comprising an inverter and a multiplier according to claim 1, characterized in that. that two or more function blocks are cascaded to each other.