We are designing and manufacturing fast high-voltage solid-state switch modules with single push and push-pull switch configurations using MOSFET, SiC, IGBT, MCT, and thyristor technologies for AC and DC, with a maximum voltage of 200 kV. The solid-state switch program is divided into two basic categories: switches with fixed on-time (product groups A to B4) and switches with variable on-time (product groups C1 to C8). Switches with fixed conduction times are highly cost-effective and are mainly used in simple charging or discharging circuits. Due to their excellent EMC characteristics, they are ideal switching elements for damping oscillations in generator circuits, especially when connected to FDA series fast freewheeling diodes. If the application requires di/dt, very fast voltage rise time, or very short pulses, then switches with fixed conduction time are also necessary. Compared to switches with fixed conduction time, switches with variable conduction time have true relay performance and are therefore more versatile. They are ideal for applications with variable pulse width, variable duty cycle, or applications that require infinite conduction time. And the descent time is usually related to capacitive load. Contrary to settings with a single switch, push-pull circuits do not require working resistors, resulting in higher efficiency in high voltage power consumption at higher operating frequencies. Due to the absence of working resistance, the size of the input energy storage capacitor can be minimized without negatively affecting the top flatness of the generated pulses. Therefore, in square wave pulse applications with high requirements for pulse shape, push-pull switches are the ideal choice. The BELLKE switch module is always electrically isolated. They can be used as switches for positive and negative voltages. If the voltage polarity must be changed during operation (for example, in a TOF mass spectrometer with positive and negative ion acceleration), then consider AC switch technology. There are two forms of AC switches: single switch and push-pull switch. The control of the BELLKE switch is always achieved through simple TTL signals. Internal control and safety circuits provide control pulse shaping, overclocking, and temperature protection. The switch cannot be controlled incorrectly. Even under the worst working conditions, they are always in a conductive or cutoff state and have never been in an intermediate state. Similarly, the on/off rise time is not affected by any external factors, which ensures high switch reproducibility and excellent long-term reliability of the entire application circuit. The control circuit of a switch with variable conduction time has an additional prohibition input that allows connection to external overcurrent sensors, external thermal triggers, or other external safety circuits. All switches have optional cooling functions, such as improved thermal conductivity (option ITC), non-conductive ceramic cooling surface (option CCS), insulated copper cooling flange (option GCF), non-conductive ceramic cooling flange (option GCF-CER), or non insulated heat sink made of copper (option CF) or lightweight graphite material (option CF-GRA). For applications with harsh corona discharge, the heat sink can also be made of non-conductive high-performance ceramics (option CF-CER). If the air cooling reaches its limit, liquid cooling will be used. There are two methods of liquid cooling: indirect liquid cooling (option ILC) and direct liquid cooling (option DLC). Indirect liquid cooling has moderate cooling efficiency and is designed for simple conductive and non-conductive coolants, such as tap water or deionized water. Direct liquid cooling (optional DLC) is more efficient and suitable for high-frequency operation. It uses perfluoropolyether (PFPE), perfluorocarbon (PFC), or hydrofluoroether (HFE) as non-conductive coolants. Customized switches with separate electrical and mechanical modifications can be provided upon request.

The new fast high-voltage square wave pulse generator can provide a continuous switching frequency of up to 3 MHz. Equipped with sockets for HV power supply, control signals, and HV pulse monitor outputs. Only applicable for DLC liquid cooling, but can also be operated without using lower frequency cooling circuits. Model: FSWP 91-01, FSWP 51-02, FSWP 41-03

A new ultra small MOSFET Q-switch driver with LED indicator. Equipped with frequency and temperature monitoring. Hot trigger. Highly reliable. The switching behavior is temperature independent and there is no avalanche phenomenon! Operation from 0V to maximum voltage. The recovery time is very short. Rise time 5 to 7 ns. Frequency up to 100 kHz, connected to optional ceramic heat sink. Size 64 x 30 x 18 millimeters (2.5 x 1.18 x 0.7 inches). Model: FQD 80-02-C, FQD 60-03-C, FQD 50-02-C, FQD 40-03-C

Behlke high-speed high-voltage pulse generator:

The standard high-voltage pulse generator program is based on the BEHLKE HV solid-state switch of the HTS series. The plan includes fast Pockels battery drivers for Q-switches and other laser applications, as well as precision square wave pulse generators for deflection and acceleration grid drivers, drivers for kick magnets, ion traps, TWR and klystron modulators, and many other analytical, measurement, and testing equipment. The series models FQD, GHTS, FHPP, and FSWP are standard product lines for "plug and play" solutions. All BELLKE pulse generators are designed for system integration, which means that pulse generators require high voltage power and control signal sources to operate. According to the optional cooling function (heat sink, product group D). At this point, it should be mentioned that each BELLKE switch can also be converted into a pulse generator unit by combining with other passive and active component components, which are integrated with the switch and packaged in a housing. Such additional components can include damping resistors, working resistors, RC buffers, buffer capacitors, freewheeling diodes, and high-voltage sockets. The advantages of an integrated pulse generator solution are reduced EMI, decreased corona discharge, reduced volume, improved insulation for electrical performance, simplified high-voltage wiring, and lower assembly costs.

A very fast 65 kV push-pull high voltage switch with peak current of 100 or 200 amperes using LC2 low capacitance technology. Provide flange or tubular casing. A replaceable control unit with intelligent circuits, easy and reliable to operate. Monitor switch and driver temperature, auxiliary voltage, control frequency and pulse width. TTL compatible control input and disable input. Short circuit protection fault output. The LED indicator light indicates the operating status and pulse indication. Model: HTS 651-10-GSM, HTS 651-20-GSM

The new type of very fast single HV switch is suitable for voltages of 100 or 200 amperes pk, up to 150 kV. The current in LC2 low capacitance technology. Provide flange or tubular casing. A replaceable control unit with intelligent circuits, easy and reliable to operate. Monitor switch and driver temperature, auxiliary voltage, control frequency and pulse width. TTL compatible control input and disable input. Short circuit protection fault output. The LED indicator light indicates the operating status and pulse indication.

型号： HTS 1501-20-LC2，HTS 1501-10-LC2，HTS 1001-20-LC2，HTS 1001-10-LC2

A new bipolar AC push-pull high-voltage switch suitable for TOF and similar applications. Used for positive and negative voltages without changing the polarity of the switch. +/-Voltage ranging from 3 to+/-30 kV. The peak current ranges from 15 to 260 amperes. Rise and fall time less than 10 ns. Model example: HTS 151-03-AC-GSM

The new HTS compact series. Small MOSFET HV switch module 79 x 38 x 17 mm (LxWxH) as a single push-pull and AC switch, suitable for voltages ranging from 3 to 12 kV. According to the requirements, the maximum voltage is 24 kV. The peak current is 15 to 260 amperes (depending on the voltage). The on resistance is as low as 0.2 ohms (depending on the model). The rise and fall time ranges from 5 to 10 ns (depending on the model). Pulse width of 40 ns to infinity. Intelligent control circuit with advanced EMC filter, easy and reliable operation. Monitor switch and driver temperature, auxiliary voltage, control frequency and pulse width. TTL compatible control and input disabled. Fault output. LED indicator lights are used for pulse and status indication. Used for the replacement of compact scientific instruments and reed relays. Model examples: HTS 41-26-C, HTS 121-01-C, HTS 61-01-AC-C, HTS 61-01-GSM-C

Behlke's new universal control unit for HTS switches:

B ehlke has developed a new control and driver unit for all HTS single, push-pull, AC, and AC push-pull HV switches. The control circuit is an important component of any solid-state switch, which essentially determines the switching behavior and the long-term reliability of the anti noise and switch module. The new control unit VC4 is an important component of the successful switch series HTS, reflected in over 25 years of experience in developing high-voltage solid-state switches. Due to the harsh electromagnetic environment caused by the high di/dt and dv/dt of the closed load circuit, the electromagnetic compatibility (EMC) of the control circuit is crucial for the reliable function of the entire switch module. There is always electromagnetic coupling between the induction loop area of the high-voltage circuit and the control circuit. The area of these induction loops cannot be avoided, but it can be minimized through carefully designed circuits.

By using components and advanced proprietary circuits, the VC4 control circuit can now be reduced to a built-in volume of less than 20 ml, fundamentally improving its noise resistance. Further improvement of EMC has been achieved by using U to implement six times the number of multi-layer PCBs for signal tracks between tiling and ground plane. A new input filter allows for reliable control of input wiring up to a certain length even under worst-case EMC shielding conditions.