Hitachi CP-X200 Inverter DC braking feature stops the AC commutation to, Keypad devices

Models: CP-X200

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DC Braking

The inverter DC braking feature stops the AC commutation to the

 

motor, and sends a DC current through the motor windings in order

 

to stop the motor. Also called “DC injection braking,” it has little

 

effect at high speed, and is used as the motor is nearing a stop.

Deadband

In a control system, the range of input change for which there is no

 

perceptible change in the output. In PID loops, the error term may

 

have a dead band associated with it. Deadband may or may not be

 

desirable; it depends on the needs of the application.

Digital Operator

For Hitachi inverters, “digital operator panel” (DOP) refers first to

Panel

the operator keypad on the front panel of the inverter. It also includes

 

hand-held remote keypads, which connect to the inverter via a cable.

 

Finally, the DOP Professional is a PC-based software simulation of

 

the keypad devices.

Diode

A semiconductor device that has a voltage-current characteristic that

 

allows current to flow only in one direction, with negligible leakage

 

current in the reverse direction. See also Rectifier.

Duty Cycle

1. The percent of time a square wave of fixed frequency is ON (high)

 

versus OFF (low).

 

2. The ratio of operating time of a device such as a motor to its

 

resting time. This parameter usually is specified in association

 

with the allowable thermal rise for the device.

Dynamic Braking

For the L200 inverter models, the braking unit and braking resistor

 

are optional (external) components. The dynamic braking feature

 

shunts the motor-generated EMF energy into a special braking

 

resistor. The added dissipation (braking torque) is effective at higher

 

speeds, having a reduced effect as the motor nears a stop.

Error

In process control, the error is the difference between the desired

 

value or setpoint (SP) and the actual value of a the process variable

 

(PV). See also Process Variable and PID Loop.

EMI

Electromagnetic Interference - In motor/drive systems, the switching

 

of high currents and voltages creates the possibility of generating

 

radiated electrical noise that may interfere with the operation of

 

nearby sensitive electrical instruments or devices. Certain aspects of

 

an installation, such as long motor lead wire lengths, tend to increase

 

the chance of EMI. Hitachi provides accessory filter components you

 

can install to decrease the level of EMI.

Four-quadrant

Referring to a graph of torque versus direction, a four-quadrant drive

operation

can turn the motor either forward or reverse, as well as decelerate in

 

either direction (see also reverse torque). A load that has a relatively

 

high inertia and must move in both directions and change directions

 

rapidly requires four-quadrant capability from its drive.

AppendixAppendix A

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Hitachi CP-X200 instruction manual Inverter DC braking feature stops the AC commutation to, Keypad devices, Versus OFF low

CP-X200 specifications

The Hitachi CP-X200 is a versatile and robust projector designed to cater to the needs of educational and business environments. It combines affordability with high-quality performance, making it an attractive option for various presentations and multimedia applications.

At the heart of the CP-X200 is its high brightness capability, with a lumen output of 3,000 ANSI lumens. This feature enables the projector to deliver clear and vibrant images even in well-lit rooms. The resolution of XGA (1024 x 768 pixels) ensures that text and graphics are sharp, making it suitable for everything from classroom lectures to corporate presentations.

One of the standout characteristics of the Hitachi CP-X200 is its advanced lamp technology. The projector uses a long-lasting lamp that can provide up to 5,000 hours of usage in standard mode, allowing for extended intervals between lamp replacements. Additionally, the ECO mode can further enhance the lamp life, extending its longevity while reducing energy consumption.

The CP-X200 is equipped with a variety of connectivity options, including HDMI, VGA, and composite inputs, allowing users to easily connect it to various devices such as laptops, DVD players, and other multimedia systems. The inclusion of USB and RS-232 interfaces ensures compatibility with different control systems, making it a flexible choice for diverse setups.

Another significant feature is the projector's built-in 10-watt speaker, which provides decent audio output, eliminating the need for external speakers in smaller venues. The speaker system enhances presentations, ensuring that audio and visuals are cohesive, promoting better audience engagement.

Portability is another key aspect of the Hitachi CP-X200, which weighs just around 3.5 kg (approximately 7.7 lbs), allowing for easy transport between locations. Its compact design makes it suitable for both fixed installations and mobile use, catering to professionals who require a projector that adapts to various environments.

The user-friendly interface and robust remote control enhance the projector's operability, providing easy access to essential functions. Additionally, features such as auto keystone correction adjust the image to maintain consistent quality even when the projector is not perfectly aligned with the screen.

In summary, the Hitachi CP-X200 is a feature-rich projector that embodies reliability, performance, and ease of use. Its combination of high brightness, various connectivity options, long lamp life, portability, and integrated audio makes it an excellent choice for education and business professionals seeking a dependable presentation solution.