Power Control System Using Modulated PMBUS Over Single Transmission Line
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Solution Overview
Problem
Current power control systems in large-scale data centers require separate configurations and circuits for transmitting power management bus (PMBUS) to servers, leading to delayed error detection, increased maintenance costs, and hardware hazards due to the need for manual configuration with each power supply unit replacement.
Innovation Solution
A power control system that transmits the power management bus simultaneously with the power signal through a physical transmission line using microcontrollers for modulation and demodulation, with filters to separate the signals, reducing the need for additional hardware and configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate power management circuit and wire configurations are used to transmit PMBUS to server, then power management functionality is achieved, but device complexity and cost increase
Solution Approach 1:
The patent combines the power signal transmission and PMBUS signal transmission into a single physical transmission line (power cable). The power management unit transmits both the power signal and the PMBUS signal through the same cable, eliminating the need for separate wire configurations and reducing hardware complexity while maintaining power management functionality
Solution Approach 2:
The power cable is designed to serve multiple functions: it transmits both the power signal and the PMBUS signal. This multi-functionality reduces the number of separate transmission lines needed and simplifies the overall hardware configuration
2Adaptability or versatility
If power management circuit is replaced, then new power supply unit can be installed, but time-consuming configuration procedure is required
Solution Approach 1:
The system enables automatic identification and configuration when a power supply unit is replaced. The power management unit can automatically detect the new power supply unit and establish communication through the transmitted PMBUS signal, eliminating the need for manual configuration procedures and reducing installation time
3Loss of information
If power management circuit is used to transmit PMBUS, then server can acquire power supply information, but error detection is delayed
Solution Approach 1:
The PMBUS signal transmitted through the power cable provides continuous feedback between the power supply unit and the server. This enables the server to continuously monitor power supply information and detect errors in real-time, improving error detection timeliness while maintaining information transmission
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 approach enables cost-effective and efficient power management by broadcasting power information across all power zones, enhancing error detection and reducing hardware hazards through simultaneous transmission and filtering of power and PMBUS signals.
Implementation Method 1
The first filter is coupled to the transmission line and the server, for filtering out the power signal from the transmission line to the server
Implementation Method 2
The second filter is coupled to the transmission line and the first microcontroller, for filtering out the modulated PMB from the transmission line
Implementation Method 3
The first microcontroller is coupled to the power supply unit, for performing modulation to the PMB according to the carrier frequency, to generate a modulated PMB
Implementation Method 4
The second microcontroller is coupled to the power supply unit, the first filter and the server, for performing demodulation to the modulated PMB according to the carrier frequency, to generate the PMB to the server
Data Source
AI summary
A power control system includes a power supply unit, first and second microcontrollers, a transmission line and first and second filters, for transmitting a power management bus (PMB) to a server. The power supply unit provides a power signal, the PMB and a carrier frequency. The first and second microcontrollers respectively perform modulation and demodulation to the PMB according to the carrier frequency, such that the transmission line simultaneously transmits the power signal and the PMB to the server.