High Voltage Power Supply ModuleOperating in Magnetic Field

Output Voltage 2500V ~ 4000VLoad Resistance 10 M ~Magnetic Field 1.5 teslaEfficiency 60 %Input Voltage 5 V

High Voltage DC Power Supply Module MODEL：TTR-17473

MODEL：TTR-17473

Features ・Compact and Light weight ・ High Voltage Output ・ Easy Operation Specifications ・Output voltage ? 1 100 to 1 1 kV ・Output current ? 1 1.5 mA Max ・ Output voltage Ripple

Less than 0.01%（RMS）of the maximum output voltage in frequencies less than 1 MHz

・ Output control voltage ? 1 1 V to 110 V

・ Supply voltage ? 1 12 V ±10% ・ Current consumption 0 0.25A max ・ Package dimensions ? 60mm( ) ) ×41mm(H) ×20mm(D)

TOPICS High Voltage Power Supply Module Operating in Magnetic Field. MODELT TU-31334 Features ・The high voltage power supply module can

operate in a strong magnetic field. ・ The high voltage supply module has

employed a third order longitudinal mode Rosen-type piezoelectric ceramic transformer.

・ The module is jointly developed by NF and ICEPP, University of Tokyo.

Specifications (preliminary) ・ Input voltage 5 5V ・ Output voltage 2 2500V to 4000V ・ Load resistance 1 10 MΩ ・ Efficiency 6 60% ・ Magnetic field 1 1.5 tesla ・ Dimensions 200mm(W)×150mm(H)×40(D) mm mmax

Specifications are subject to change without notice. Manufactured by NF Corporation Office ：6-3-20,Tsunashima Higashi, Kohoku-ku, Yokohama, Japan

High Voltage Power Supply Module

New product introduction

Problem About Supply of Transformer

• A company is reluctant to resume production of third order Rosen-type transformer.

• The company proposes an alternative transformer compatible with current production line.

• Samples of the alternative transformer, which is newly developed, arrived last month.

• The alternative transformer is expected to show better performance.

High Voltage Power Supply Module for Commodity Use

• High voltage power supply module incorporating the ceramic transformer is produced for commodity use

• The module provides a fixed high voltage of 4 kV with an output current up to 160 A at an efficiency of 70 %.

• The inductance being implemented by a air-core coil, the module can be operated in magnetic field.

• Price is a few dollars

Third Order Longitudinal Mode Piezoelectric Ceramic Transformer

High Amplitude Ratio ( Turn Ratio ~ 40) Low Internal Resistance ( 0.25 )

Equivalent Circuit of Piezoelectric Transformer And its Parameters

Amplitude Ratio as Function of Frequency and Load Resistance

Resonance Shown by Transformer Loaded with 100 k

High Voltage Power Supply ModuleKept Under Control of Network

Module is interfaced by Neuron chipFunction of module under control of Neuron chip is controlled via network Turn on and off module

Set of output high voltage

Recovery from feedback breakdown

Output current monitor

Components of High Voltage Power Supply Module

• Reference Voltage 0V ~ 4V

• Error Amplifier• Voltage-Controlled Oscillator (VCO)• Driver Circuit• Piezoelectric Transformer• Cockcroft-Walton (CW) Circuit three stages

• Divider resistor 1 : 1000

• Circuit for Network Control

Output high voltage is stabilized by utilizing the frequency dependence of amplitude ratio

Amplitude and Phase of Transmission Path From Output of Error Amplifier to Output of CW Circuit With Load of 6 M

Protection Utilizes Breakdown of Feedback

Setup for

Measurement

Output voltage versus driving frequency for load of 20 M with supply voltages from1 V to 3.5 V by stepped at 0.5 V.

Output voltage is plotted against driving frequency for a load of 10 M and various supply voltage.

Output voltage versus driving frequency for a load of 4.7 M with various supply voltages

Amplitude Ratio of Ceramic Transformer

When load is 20 M, an equivalent resistance of the load viewed from the input of the CW circuit is about 200 k. So the amplitude ratio of the ceramic transformer is expected to be about 120 at the resonance frequency

In practice, the amplitude ratio is found to be more than eighty around the resonance frequency.

LonWorks Node for Module

Output H.V. vs. VCO Frequency for Several Supply Voltages

Efficiency. vs. VCO Frequency for Several Supply Voltages

Efficiency vs.Output H.V. for Several Supply Voltages

• The efficiency does not depend on the supply voltage

• The efficiency depends mainly on the VCO frequency.

• Dependence of the efficiency on the VCO frequency is defined by the inductance