Two-Wire Bus for Door Motors Merging Power and Data
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Solution Overview
Problem
Existing home automation systems require multiple electrical connections for power supply and data transmission, leading to complex installations and increased costs due to the use of separate lines for PWM voltage and data communication.
Innovation Solution
A two-wire communication and supply bus that carries both pulse-width modulated (PWM) voltage for electric motors and amplitude-modulated signals for data transmission, allowing for the simultaneous supply of power and communication through a single bus using PWM and ASK modulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate electrical lines are used for PWM voltage supply and data transmission, then reliable power supply and data communication are achieved, but the number of electrical connections increases and installation complexity increases
Solution Approach 1:
The patent combines the PWM voltage supply line and the data transmission line into a single two-wire bus. The data communication is achieved by amplitude-modulating the PWM voltage signal, allowing both power delivery and data exchange over the same physical connection, thereby reducing installation complexity while maintaining communication reliability
Solution Approach 2:
The two-wire bus serves multiple functions simultaneously: it provides PWM voltage supply for motor control and carries amplitude-modulated data signals for communication. This multi-functional design eliminates the need for separate dedicated lines, reducing the number of connections required
2Reliability
If separate electrical lines are used for PWM voltage supply and data transmission, then clear signal separation is achieved, but the number of electrical connections increases and costs increase
Solution Approach 1:
The patent merges power supply and data transmission into a single two-wire bus, reducing material costs and installation expenses. Signal quality is maintained through amplitude modulation techniques that encode data on the PWM voltage signal, allowing clear differentiation between power and data functions despite shared physical infrastructure
Solution Approach 2:
The patent uses amplitude modulation to change the parameters of the PWM voltage signal, encoding data information by varying the amplitude of the voltage pulses. This allows data transmission over the same line used for power supply without compromising signal integrity, as the receiver can distinguish data from power based on amplitude variations
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution reduces the number of electrical connections needed, simplifying the installation process and lowering costs while maintaining effective data transmission and motor operation.
Implementation Method 1
a control station for controlling the movement apparatus, said control station comprising a circuit for supplying a pulse-width modulated (PWM) supply voltage to a two-wire communication and supply bus
Implementation Method 2
at least one utilizer device that uses said PWM supply voltage, which is coupled to said two-wire communication bus, said utilizer device comprising a circuit for converting said PWM supply voltage into a supply current for an electric motor
Implementation Method 3
A two-wire communication and supply bus that carries both pulse-width modulated (PWM) voltage for electric motors and amplitude-modulated signals for data transmission, allowing for the simultaneous supply of power and communication through a single bus using PWM and ASK modulation
Data Source
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AI summary
An apparatus (1) for moving a closing barrier, in particular for moving a door or gate, comprises: - a control station (10) for controlling the movement apparatus, said control station (10) comprising a supply circuit (100) for supplying a PWM supply voltage to a two-wire communication and supply bus (B) coupled to said control station (10); and - at least one utilizer device (12) that uses said PWM supply voltage and is coupled to said two-wire communication bus (B), said utilizer device (12) comprising a conversion circuit (120) for converting said PWM supply voltage into a supply current for an electric motor (122) for movement of said closing barrier. The control station (10) comprises an amplitude-modulation circuit (102) for transmitting an amplitude-modulated data communication signal superimposed on said PWM supply voltage onto said communication and supply bus (B), and the at least one utilizer device (12) that uses said PWM supply voltage is coupled to a circuit (124) for amplitude demodulation of said amplitude-modulated data communication signal for receiving signals from said communication and supply bus (B).