Frequently Asked Questions

1–12

Getting Started

Q.What is the main advantage in using an inverter to drive a motor, compared to alternative solutions?

A.An inverter can vary the motor speed with very little loss of efficiency, unlike mechanical or hydraulic speed control solutions. The resulting energy savings usually pays for the inverter in a relatively short time.

Q.The term “inverter” is a little confusing, since we also use “drive” and “amplifier” to describe the electronic unit that controls a motor. What does “inverter” mean?

A.The terms inverter, drive, and amplifier are used somewhat interchangeably in industry. But there are subtle differences. A drive can refer to the motor, the control electronics, or both. This term is used particularly when the motor and electronics are integrated in the same housing. The term variable speed drive can include many types of devices – anything that has a variable speed output, which includes the Hitachi inverter. Amplifier more commonly refers to a linear amplifier for servo motor control, or a stepper motor driver IC. Finally, we use inverter to describe the Hitachi motor controller because of the way the switching electronics alternately inverts or directly couples its internal DC voltage bus to generate a variable AC output.

Q.Although the L100 inverter is a variable speed drive, can I use it in a fixed-speed application?

A.A fixed speed application usually is a result of cost-sensitivity or negligible benefits if variable speed were used (consumer products are examples). In those cases, the power source connects directly to the motor (no special drive needed). However, using a variable speed drive can benefit many type of industrial and commercial motor applications, by providing controlled accel- eration and deceleration, high torque at low speeds, and energy savings over alternative solutions.

Q.Can I use an inverter and AC induction motor in a positioning application?

A.That depends on the required precision, and the slowest speed the motor will must turn and still deliver torque. If you set the torque boost, the L100 can develop starting torque at 100% of its rating. However, DO NOT use an inverter if you need the motor to stop and hold the load position without the aid of a mechanical brake (use a servo or stepper motion control system).

Q.Does the optional digital operator interface or the PC software (DOP Plus) provide features beyond what is available from the keypad on the unit?

A.Yes. However, note first that the same set of parameters and functions are equally accessible from either the unit’s keypad or from remote devices. The DOP Plus PC software lets you save or load inverter configurations to or from a disk file. And, the hand-held digital operator provides hard-wired terminals, a safety requirement for some installations.

L100 specifications

The Hitachi L100 series is a versatile range of variable frequency drives (VFDs) designed to enhance performance in various industrial applications. Known for their reliability and efficiency, these drives are widely used in motors for pumps, fans, compressors, and conveyors.

One of the main features of the Hitachi L100 is its impressive control capabilities. The drive supports both scalar and vector control modes, allowing for precise speed and torque management. This flexibility ensures optimal motor performance across different load conditions. Additionally, the L100 series offers an impressive speed range, which can accommodate a wide variety of applications, from low-speed to high-speed requirements.

The L100 is equipped with built-in functionality for energy saving. By utilizing advanced control algorithms and auto-tuning features, the drive optimizes energy consumption, reducing operational costs and contributing to improved overall system efficiency. The energy-saving mode is particularly beneficial in applications where load conditions frequently change.

Another hallmark of the Hitachi L100 is its robust communication capabilities. The drive supports various communication protocols including Modbus and Ethernet, making it easy to integrate into existing control systems. This connectivity allows for real-time monitoring and diagnostics, which aids in predictive maintenance and minimizes downtime.

In terms of user-friendliness, the L100 series includes a clear, intuitive keypad that simplifies programming and operation. The drive also features a wide range of customizable parameters, enabling users to easily tailor the settings to suit specific application requirements. Additionally, the inclusion of a customizable PID controller allows users to refine process control automatically.

Safety is a priority in the design of the Hitachi L100. The drive comes with various built-in safety features such as overvoltage, overload, and short-circuit protection, ensuring reliable operation in challenging environments. Furthermore, it complies with global safety standards, making it suitable for international applications.

Lastly, the L100's compact design ensures easy installation and minimizes the space required in control cabinets. This is especially advantageous in facilities where space is at a premium. Overall, the Hitachi L100 series represents a combination of advanced technology, user-friendly features, and reliable performance, making it a popular choice for industrial automation solutions.

Hitachi L100 instruction manual Frequently Asked Questions

Models: L100

Frequently Asked Questions

L100 specifications