PWM

Generates an ideal signal with pulse width modulation in accordance with the input signal of the well.

blockType: PWM

Path in the library:

/Basic/Discontinuities/PWM

Description

Block PWM generates an ideal signal with pulse width modulation.

Pulse width modulation (PWM) is a method of encoding an analog signal using square pulses usage. The principle of PWM is to change the pulse duration at a constant pulse frequency. The ratio of pulse duration to period is called duty cycle. The relationship between the modulated signal and the duty cycle is described as follows:

Where and — the upper and lower limits of the output signal, respectively.

For the block PWM the duty cycle lies in the range [0,1]. The ideal PWM signal is proportional to the duty cycle .

Ports

Input

# IN_1 — working cycle
scalar

Details

Relative pulse duration in the form of a scalar in the range [0,1].

Data types	`Float16`, `Float32`, `Float64`, `Int8`, `Int16`, `Int32`, `Int64`, `UInt8`, `UInt16`, `UInt32`, `UInt64`, `Bool`
Complex numbers support	Yes

Output

# OUT_1 — The output signal
scalar | vector | the matrix

Details

A PWM signal with an operating cycle equal to the value of the input signal.

Data types	`Float64`
Complex numbers support	Yes

Parameters

Main

# Period — pulse period
Scalar / array of real numbers

Details

The time between the rising edges of successive pulses of the output signal. A small value corresponds to a high-frequency pulse.

Default value	`1`
Program usage name	`Period`
Tunable	Yes
Evaluatable	Yes

# Disallow zero duty cycle — avoid algebraic loops
Logical

Details

Enable this option to break the algebraic loops containing the block. PWM.

Enabling this parameter causes the signal value to become equal to 0 or lower, which will cause an input error.

Default value	`false (switched off)`
Program usage name	`DisallowZeroDutyCycle`
Tunable	No
Evaluatable	No

# Sample Time — the interval between the calculation steps
SampleTime (real number / vector of two real numbers)

Details

Specify the interval between the calculation steps as a non-negative number.

Meaning -1 for the parameter Sample Time leads to an error.

Default value	`0.1`
Program usage name	`SampleTime`
Tunable	No
Evaluatable	Yes

Algorithms

Continuous sampling mode

continuous sampled pwm

For a pulse starting at a point in time

Where — pulse width.

For the specified period , proportional to the borehole