FUJI ELECTRIC JOURNAL 2003 Vol.76-No.8

Inverters, Servo Systems and Power supplies

FRENIC-Mini Series of Compact Inverters
Yoshihiro Matsumoto, Shinichi Ishii, Takashi Nakanishi
The FRENIC-Mini series of inverters were designed to be small size, low-cost and to realize a level of performance and functionality that was previously only available with top-of-the-line inverter models, and are suitable for sophisticated applications such as horizontal transport as well as simple tasks such as variable speed operation. Featuring a longer life, improved maintainability and an environmentally-conscious design that incorporates noise reduction measures and the use of lead-free solder in some parts, this inverter series was designed to be a global product that can be used in a wide-range of applications. This paper introduces features of the FRENIC-Mini series of inverters.

RHC-C Series of PWM Converters
Toshihisa Toyota, Misao Kinoshita, Naoki Kanazawa
PWM converters such as utilized in a general-purpose inverterbased variable speed driving system are suitable for various applications because they aim to comply with guidelines for the suppression of harmonic emission, to achieve energy-savings by means of a power regeneration function and to reduce the capacitance of power facilities. Under these circumstances, the RHC-C series of PWM converters was newly developed to dramatically enhance functionality and ease of operation by expanding the capacity of the series, providing support for all types of communication functions, and coming equipped with a touch panel as standard equipment. This paper introduces the features and specifications of the RHC-C series.

Control Technologies with Vector-Control-Inverter "FRENIC5000VG7S System"
Yoshikazu Ichinaka, Tatsuya Yamada, Tsutomu Miyashita
In fields where dedicated controllers and variable speed driving systems once were used, year-by-year it is becoming increasingly common to utilize a customized general-purpose inverter system that provides dramatically enhanced performance and functionality. This paper presents the features of the FRENIC5000VG7S and describes control technology capable of driving a wide range of devices, from induction machines to synchronous machines and DC machines. In addition to example applications that leverage flexible digital control system technology, an example of a practical application of a programmable option card is also presented.

New Induction Heating Inverter for Professional Use
Hirotaka Shiraishi, Takanobu Kadogaki, Toshiaki Shiroki
As globalization increases, there is heightened interest in environmental protection and careful sanitation management. In the food products and kitchen industries, the trend toward increased use of induction heating (IH) is gaining momentum in response to the growing popularity of electromagnetic cooking appliances. Fuji Electric has recently commercialized a new built-in-type 2.5 kW professional-use induction heating inverter that can be used in heaters that are built into tables. This paper presents the specifications, circuit configuration and features of this induction heating inverter.

Extension of AC Servo System "FALDIC-alpha Series"
Hiroaki Hayashi, Takumi Migaki, Isao Igarashi
Since its release onto the market, Fuji Electric's FALDIC-alpha Series servo system has been well received. However, in response to requests from industries such as printing machines, molding machines, large conveying equipment, etc., Fuji Electric has recently released a medium-capacity FALDIC-alpha Series. For this series, capacity has been increased from 2.9 to 15 kW, and a 16-bit serial encoder, vibration suppressing control and a notch filter are provided as standard equipment. This paper presents an overview of the medium-capacity FALDIC-alpha Series and introduces its specifications and features.

Motion Control System for Integrated Controller "MICREX-SX"
Yasutaka Tominaga, Yoshihiro Arizono, Hideo Hatoria
In response to requests for motion control that is capable of complicated positioning, has a greater number of control axes and is easier to use, Fuji Electric has developed a motion control module (MC module) that used by the MICREX-SX. The MC module control 8 axis FALDIC-alpha servo systems and can perform complicated and continuous positioning operations. Moreover, the motion control and sequence control can be implemented independently to simplify system development and maintenance. This paper introduces the characteristics and application examples of a motion control system that utilizes MC modules.

Example Applications of Motion Control System
Hiroyuki Imoto, Yasutaka Tominaga, Tadakatsu Aida
Three types of motion control methods are selectable with the MICREX-SX integrated controllers and the FALDIC-alpha servo systems. This paper describes the FB (CPU module), tabular (MC module) and distributed (servo amp) programming methods and system configurations. Examples of actual application are described and a method for selecting a motion control method according to the action of the machine is presented.

UPS6000D-3 Series of Large Capacity Uninterruptible Power Systems
Hiroshi Yamamoto, Hisashi Koubayashi, Kenichi Ikeda
Fuji Electric has developed a large capacity UPS for highly reliable always-on inverter-based power supply systems. An improved cooling system enables the device to be made smaller and lighter in weight, while increasing the capacity of the IGBT power unit. DSP-based highspeed digital control supports fully autonomous parallel systems capable of adding UPS capacity in response to an increase in load volume and enabling the configuration of highly reliable systems. A Web/SNMP card is provided as standard equipment, making it possible to easily monitor the UPS operating status via a network.

UPS6000D-1 Series of New-type Medium Capacity Uninterruptible Power Systems
Mamoru Hieda, Noriyoshi Ishii, Masahiko Katou
Among the class of medium capacity uninterruptible power systems where it is difficult to achieve product differentiation, the UPS6000D-1 Series has incorporated peripheral functions into the UPS main unit and has optimized component parts to achieve a smaller footprint and lighter weight of 89 % and 84 %, respectively, than the conventional UPS and its peripheral panel. Able to meet demands for 100 V/200V direct input voltage and UPS output voltage with a single UPS unit, this new product series also allows maintenance to be performed online. This paper presents the features of the UPS6000D-1, and describes its configuration and elemental technologies.

Expansion of Mini-UPS and Support of Networked Operation
Hiroshi Sandanbata, Nobuhisa Tanaka, Hideomi Naitou
Fuji Electric is working to provide power supply solutions in response to market needs for various mini-UPS applications and for the control of those applications. This paper introduces the following custom-spec UPSs: the DipHunter, a maintenance-free system that helps prevent brownouts, the P series for use in elevators, the foreign voltage-compliant J series for export, and the NetpowerProtect 200V, 3,000 VA rack-type. Additionally, the Multi-servo Shutdown Box, the Web/SNMP card and NetpowerView F UPS control software are also introduced as UPS peripheral devices that support networked usage.

Motor Circuit Protection "Manual Motor Starters"
Katsunori Kuboyama, Hisao Kawata, Yoshinobu Hamada
At present, IEC standards have already begun to be adopted as Japanese technical standards, and the trend toward globalization of standards for low-voltage switching devices and of customer electronic equipment is progressing. Moreover, customer demand is increasing for low-voltage switching devices that are safe and can be configured at low cost within a panel. This paper introduces the features, specifications and construction of the Manual Motor Starter, a revolutionary new product that integrates the function of a circuit breaker and a thermal overload relay into a single compact unit that is revolutionizing the configuration of electronic motor circuits in Japan. Also described are snap-on accessories and wire-saving components.

Development of Compact Combination Starter
Shinobu Takeuchi, Isamu Nagahiro, Hideki Daijima
The combination starter consists of a Manual Motor Starter, an electromagnetic contactor, and a link module, and together a base plate according to device ratings. The combination starter is an innovative electric motor control device that enables overload and open phase protection for an electric motor, and furthermore type 2 (IEC classification) short-circuit protection coordination for 400 V and 50 kA without the use of a fuse.

One Circuit-type Electric Power and Distribution Monitor Unit
Fumito Takahashi, Sadao Higuchi, Toshiaki Tani
In order to promote energy conservation, after determining the actual state of energy usage by equipment or load devices, it is necessary to set targets, implement energy-reducing measures and verify the effect of those measures. For these purposes, onsite measurement by measuring instruments and precise control are essential. This paper introduces a high-precision electric power monitoring unit that provides an abundance of measuring functions. This electric power monitoring unit is equipped with a relay function that makes it possible to monitor the maintenance status of electric equipment. The unit is especially suited for installation in mechanical systems and at terminal load in equipment.

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